Search

Keith D. Walker

Supervisory Patent Examiner (ID: 17867, Phone: (571)272-3458 , Office: P/1735 )

Most Active Art Unit
1735
Art Unit(s)
1735, 1795, 1726, 1745
Total Applications
568
Issued Applications
152
Pending Applications
56
Abandoned Applications
363

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 5753779 [patent_doc_number] => 20060222928 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2006-10-05 [patent_title] => 'Fuel cell system' [patent_app_type] => utility [patent_app_number] => 11/390256 [patent_app_country] => US [patent_app_date] => 2006-03-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 3 [patent_no_of_words] => 4609 [patent_no_of_claims] => 29 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 0 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] => publications/A1/0222/20060222928.pdf [firstpage_image] =>[orig_patent_app_number] => 11390256 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/390256
Fuel cell system Mar 27, 2006 Abandoned
Array ( [id] => 5873754 [patent_doc_number] => 20060166081 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2006-07-27 [patent_title] => 'Battery manifold vent' [patent_app_type] => utility [patent_app_number] => 11/388709 [patent_app_country] => US [patent_app_date] => 2006-03-24 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 6 [patent_no_of_words] => 4998 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 0 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] => publications/A1/0166/20060166081.pdf [firstpage_image] =>[orig_patent_app_number] => 11388709 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/388709
Battery manifold vent Mar 23, 2006 Abandoned
Array ( [id] => 8591620 [patent_doc_number] => 08349495 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2013-01-08 [patent_title] => 'Nonaqueous battery with composite negative electrode' [patent_app_type] => utility [patent_app_number] => 11/387776 [patent_app_country] => US [patent_app_date] => 2006-03-24 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 10 [patent_no_of_words] => 18369 [patent_no_of_claims] => 30 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 153 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 11387776 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/387776
Nonaqueous battery with composite negative electrode Mar 23, 2006 Issued
Array ( [id] => 5850923 [patent_doc_number] => 20060234114 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2006-10-19 [patent_title] => 'Rechargeable battery' [patent_app_type] => utility [patent_app_number] => 11/388184 [patent_app_country] => US [patent_app_date] => 2006-03-23 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 7 [patent_no_of_words] => 3187 [patent_no_of_claims] => 24 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 0 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] => publications/A1/0234/20060234114.pdf [firstpage_image] =>[orig_patent_app_number] => 11388184 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/388184
Rechargeable battery with flexibly connected vent plugs Mar 22, 2006 Issued
Array ( [id] => 5759920 [patent_doc_number] => 20060210865 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2006-09-21 [patent_title] => 'Fuel cell' [patent_app_type] => utility [patent_app_number] => 11/376877 [patent_app_country] => US [patent_app_date] => 2006-03-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 10 [patent_figures_cnt] => 10 [patent_no_of_words] => 4831 [patent_no_of_claims] => 5 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 0 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] => publications/A1/0210/20060210865.pdf [firstpage_image] =>[orig_patent_app_number] => 11376877 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/376877
Fuel cell with interweaving current collector and membrane electrode assembly Mar 14, 2006 Issued
Array ( [id] => 4566453 [patent_doc_number] => 07858258 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2010-12-28 [patent_title] => 'Cascaded fuel cell stack operation with anode gas recirculation' [patent_app_type] => utility [patent_app_number] => 11/367156 [patent_app_country] => US [patent_app_date] => 2006-03-03 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 7 [patent_no_of_words] => 7651 [patent_no_of_claims] => 5 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 382 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/07/858/07858258.pdf [firstpage_image] =>[orig_patent_app_number] => 11367156 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/367156
Cascaded fuel cell stack operation with anode gas recirculation Mar 2, 2006 Issued
Array ( [id] => 5101050 [patent_doc_number] => 20070184312 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2007-08-09 [patent_title] => 'Power generator shut-off valve' [patent_app_type] => utility [patent_app_number] => 11/351175 [patent_app_country] => US [patent_app_date] => 2006-02-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 7 [patent_no_of_words] => 6603 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 0 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] => publications/A1/0184/20070184312.pdf [firstpage_image] =>[orig_patent_app_number] => 11351175 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/351175
Power generator shut-off valve Feb 8, 2006 Issued
Array ( [id] => 8200268 [patent_doc_number] => 08187764 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2012-05-29 [patent_title] => 'Fuel cell with moisture retentive layer in MEA' [patent_app_type] => utility [patent_app_number] => 11/347275 [patent_app_country] => US [patent_app_date] => 2006-02-06 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 10 [patent_no_of_words] => 4939 [patent_no_of_claims] => 4 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 101 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/08/187/08187764.pdf [firstpage_image] =>[orig_patent_app_number] => 11347275 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/347275
Fuel cell with moisture retentive layer in MEA Feb 5, 2006 Issued
Array ( [id] => 13042 [patent_doc_number] => 07807300 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2010-10-05 [patent_title] => 'Resistance-stabilizing additives for electrolyte' [patent_app_type] => utility [patent_app_number] => 11/344376 [patent_app_country] => US [patent_app_date] => 2006-01-31 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 8 [patent_no_of_words] => 2212 [patent_no_of_claims] => 23 [patent_no_of_ind_claims] => 9 [patent_words_short_claim] => 24 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/07/807/07807300.pdf [firstpage_image] =>[orig_patent_app_number] => 11344376 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/344376
Resistance-stabilizing additives for electrolyte Jan 30, 2006 Issued
Array ( [id] => 4985646 [patent_doc_number] => 20070151983 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2007-07-05 [patent_title] => 'Fuel cartridge with a flexible bladder for storing and delivering a vaporizable liquid fuel stream to a fuel cell system' [patent_app_type] => utility [patent_app_number] => 11/340077 [patent_app_country] => US [patent_app_date] => 2006-01-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 15 [patent_figures_cnt] => 15 [patent_no_of_words] => 9470 [patent_no_of_claims] => 72 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 0 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] => publications/A1/0151/20070151983.pdf [firstpage_image] =>[orig_patent_app_number] => 11340077 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/340077
Fuel cartridge with a flexible bladder for storing and delivering a vaporizable liquid fuel stream to a fuel cell system Jan 24, 2006 Abandoned
Array ( [id] => 5022581 [patent_doc_number] => 20070148547 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2007-06-28 [patent_title] => 'Modification of an anode material and a preperation method thereof' [patent_app_type] => utility [patent_app_number] => 11/313792 [patent_app_country] => US [patent_app_date] => 2005-12-22 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 7 [patent_no_of_words] => 2388 [patent_no_of_claims] => 8 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 0 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] => publications/A1/0148/20070148547.pdf [firstpage_image] =>[orig_patent_app_number] => 11313792 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/313792
Modification of an anode material and a preperation method thereof Dec 21, 2005 Abandoned
Array ( [id] => 4431497 [patent_doc_number] => 07968250 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2011-06-28 [patent_title] => 'Fuel cartridge connectivity' [patent_app_type] => utility [patent_app_number] => 11/316216 [patent_app_country] => US [patent_app_date] => 2005-12-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 14 [patent_figures_cnt] => 29 [patent_no_of_words] => 16260 [patent_no_of_claims] => 15 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 384 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/07/968/07968250.pdf [firstpage_image] =>[orig_patent_app_number] => 11316216 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/316216
Fuel cartridge connectivity Dec 20, 2005 Issued
Array ( [id] => 5912649 [patent_doc_number] => 20060127711 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2006-06-15 [patent_title] => 'Systems and methods for fuel cartridge distribution' [patent_app_type] => utility [patent_app_number] => 11/316199 [patent_app_country] => US [patent_app_date] => 2005-12-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 8 [patent_no_of_words] => 13301 [patent_no_of_claims] => 58 [patent_no_of_ind_claims] => 6 [patent_words_short_claim] => 0 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] => publications/A1/0127/20060127711.pdf [firstpage_image] =>[orig_patent_app_number] => 11316199 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/316199
Systems and methods for fuel cartridge distribution Dec 20, 2005 Abandoned
Array ( [id] => 5655565 [patent_doc_number] => 20060141300 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2006-06-29 [patent_title] => 'Preconditioning treatment to enhance redox tolerance of solid oxide fuel cells' [patent_app_type] => utility [patent_app_number] => 11/312275 [patent_app_country] => US [patent_app_date] => 2005-12-20 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 8 [patent_no_of_words] => 2563 [patent_no_of_claims] => 21 [patent_no_of_ind_claims] => 5 [patent_words_short_claim] => 0 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] => publications/A1/0141/20060141300.pdf [firstpage_image] =>[orig_patent_app_number] => 11312275 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/312275
Preconditioning treatment to enhance redox tolerance of solid oxide fuel cells Dec 19, 2005 Abandoned
Array ( [id] => 5648783 [patent_doc_number] => 20060134515 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2006-06-22 [patent_title] => 'Energy device and various applications using the same' [patent_app_type] => utility [patent_app_number] => 11/300275 [patent_app_country] => US [patent_app_date] => 2005-12-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 12 [patent_figures_cnt] => 12 [patent_no_of_words] => 10261 [patent_no_of_claims] => 18 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 0 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] => publications/A1/0134/20060134515.pdf [firstpage_image] =>[orig_patent_app_number] => 11300275 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/300275
Energy device and various applications using the same Dec 14, 2005 Abandoned
Array ( [id] => 5596068 [patent_doc_number] => 20060159985 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2006-07-20 [patent_title] => 'Mixing gas delivery apparatus with check valve' [patent_app_type] => utility [patent_app_number] => 11/302780 [patent_app_country] => US [patent_app_date] => 2005-12-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 3 [patent_no_of_words] => 1841 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 0 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] => publications/A1/0159/20060159985.pdf [firstpage_image] =>[orig_patent_app_number] => 11302780 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/302780
Mixing gas delivery apparatus with check valve Dec 13, 2005 Abandoned
Array ( [id] => 5693994 [patent_doc_number] => 20060154141 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2006-07-13 [patent_title] => 'Structured electrolyte for micro-battery' [patent_app_type] => utility [patent_app_number] => 11/311578 [patent_app_country] => US [patent_app_date] => 2005-12-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 5 [patent_no_of_words] => 3350 [patent_no_of_claims] => 25 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 0 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] => publications/A1/0154/20060154141.pdf [firstpage_image] =>[orig_patent_app_number] => 11311578 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/311578
Structured electrolyte for micro-battery Dec 13, 2005 Issued
Array ( [id] => 5912645 [patent_doc_number] => 20060127707 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2006-06-15 [patent_title] => 'Fuel cell' [patent_app_type] => utility [patent_app_number] => 11/297378 [patent_app_country] => US [patent_app_date] => 2005-12-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 9 [patent_no_of_words] => 7292 [patent_no_of_claims] => 14 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 0 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] => publications/A1/0127/20060127707.pdf [firstpage_image] =>[orig_patent_app_number] => 11297378 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/297378
Fuel cell with fuel adjusting film Dec 8, 2005 Issued
Array ( [id] => 4995906 [patent_doc_number] => 20070011251 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2007-01-11 [patent_title] => 'Fuel cartridge for fuel cell power systems and methods for power generation' [patent_app_type] => utility [patent_app_number] => 11/296578 [patent_app_country] => US [patent_app_date] => 2005-12-08 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 22 [patent_figures_cnt] => 22 [patent_no_of_words] => 6481 [patent_no_of_claims] => 78 [patent_no_of_ind_claims] => 5 [patent_words_short_claim] => 0 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] => publications/A1/0011/20070011251.pdf [firstpage_image] =>[orig_patent_app_number] => 11296578 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/296578
Fuel cartridge for fuel cell power systems and methods for power generation Dec 7, 2005 Abandoned
Array ( [id] => 5694002 [patent_doc_number] => 20060154149 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2006-07-13 [patent_title] => 'Lithium secondary battery' [patent_app_type] => utility [patent_app_number] => 11/296277 [patent_app_country] => US [patent_app_date] => 2005-12-08 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 6 [patent_no_of_words] => 5945 [patent_no_of_claims] => 6 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 0 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] => publications/A1/0154/20060154149.pdf [firstpage_image] =>[orig_patent_app_number] => 11296277 [rel_patent_id] =>[rel_patent_doc_number] =>)
11/296277
Lithium secondary battery Dec 7, 2005 Abandoned
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