Search

David H. Chu

Examiner (ID: 7639, Phone: (571)272-8079 , Office: P/2616 )

Most Active Art Unit
2616
Art Unit(s)
2628, 2679, 2616
Total Applications
864
Issued Applications
630
Pending Applications
69
Abandoned Applications
173

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 2687272 [patent_doc_number] => 05049540 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1991-09-17 [patent_title] => 'Method and means for separating and classifying superconductive particles' [patent_app_type] => 1 [patent_app_number] => 7/353341 [patent_app_country] => US [patent_app_date] => 1989-05-17 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 18 [patent_figures_cnt] => 44 [patent_no_of_words] => 12895 [patent_no_of_claims] => 27 [patent_no_of_ind_claims] => 7 [patent_words_short_claim] => 124 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/05/049/05049540.pdf [firstpage_image] =>[orig_patent_app_number] => 353341 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/353341
Method and means for separating and classifying superconductive particles May 16, 1989 Issued
Array ( [id] => 2664061 [patent_doc_number] => 04954250 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-09-04 [patent_title] => 'Flatware separating apparatus' [patent_app_type] => 1 [patent_app_number] => 7/352356 [patent_app_country] => US [patent_app_date] => 1989-05-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 11 [patent_no_of_words] => 5765 [patent_no_of_claims] => 39 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 92 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/954/04954250.pdf [firstpage_image] =>[orig_patent_app_number] => 352356 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/352356
Flatware separating apparatus May 15, 1989 Issued
Array ( [id] => 2692479 [patent_doc_number] => 05067616 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1991-11-26 [patent_title] => 'Methods of discriminating between contaminated and uncontaminated containers' [patent_app_type] => 1 [patent_app_number] => 7/351994 [patent_app_country] => US [patent_app_date] => 1989-05-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 6 [patent_no_of_words] => 9255 [patent_no_of_claims] => 32 [patent_no_of_ind_claims] => 13 [patent_words_short_claim] => 30 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/05/067/05067616.pdf [firstpage_image] =>[orig_patent_app_number] => 351994 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/351994
Methods of discriminating between contaminated and uncontaminated containers May 14, 1989 Issued
Array ( [id] => 2728901 [patent_doc_number] => 05011026 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1991-04-30 [patent_title] => 'Solid waste disposal screening apparatus' [patent_app_type] => 1 [patent_app_number] => 7/352043 [patent_app_country] => US [patent_app_date] => 1989-05-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 5 [patent_no_of_words] => 2450 [patent_no_of_claims] => 8 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 148 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/05/011/05011026.pdf [firstpage_image] =>[orig_patent_app_number] => 352043 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/352043
Solid waste disposal screening apparatus May 14, 1989 Issued
Array ( [id] => 2700475 [patent_doc_number] => 05009370 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1991-04-23 [patent_title] => 'Municipal solid waste material sorting trommel system' [patent_app_type] => 1 [patent_app_number] => 7/350339 [patent_app_country] => US [patent_app_date] => 1989-05-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 3 [patent_no_of_words] => 2245 [patent_no_of_claims] => 18 [patent_no_of_ind_claims] => 6 [patent_words_short_claim] => 155 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/05/009/05009370.pdf [firstpage_image] =>[orig_patent_app_number] => 350339 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/350339
Municipal solid waste material sorting trommel system May 10, 1989 Issued
Array ( [id] => 2573653 [patent_doc_number] => 04927031 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-05-22 [patent_title] => 'Document sorter for reader/printer equipment' [patent_app_type] => 1 [patent_app_number] => 7/350097 [patent_app_country] => US [patent_app_date] => 1989-05-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 4 [patent_no_of_words] => 3618 [patent_no_of_claims] => 18 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 164 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/927/04927031.pdf [firstpage_image] =>[orig_patent_app_number] => 350097 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/350097
Document sorter for reader/printer equipment May 9, 1989 Issued
Array ( [id] => 2658543 [patent_doc_number] => 05072833 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1991-12-17 [patent_title] => 'Method of collecting recyclable materials' [patent_app_type] => 1 [patent_app_number] => 7/350085 [patent_app_country] => US [patent_app_date] => 1989-05-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5051 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 71 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/05/072/05072833.pdf [firstpage_image] =>[orig_patent_app_number] => 350085 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/350085
Method of collecting recyclable materials May 9, 1989 Issued
Array ( [id] => 2653580 [patent_doc_number] => 04953709 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-09-04 [patent_title] => 'Multi-stage means for sorting mixtures of solid materials' [patent_app_type] => 1 [patent_app_number] => 7/344311 [patent_app_country] => US [patent_app_date] => 1989-04-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 4 [patent_no_of_words] => 2062 [patent_no_of_claims] => 10 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 362 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/953/04953709.pdf [firstpage_image] =>[orig_patent_app_number] => 344311 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/344311
Multi-stage means for sorting mixtures of solid materials Apr 25, 1989 Issued
Array ( [id] => 2757450 [patent_doc_number] => 04994176 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1991-02-19 [patent_title] => 'Gravity concentrator having secondary wash of heavy fraction' [patent_app_type] => 1 [patent_app_number] => 7/340896 [patent_app_country] => US [patent_app_date] => 1989-04-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 2 [patent_no_of_words] => 3282 [patent_no_of_claims] => 8 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 292 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/994/04994176.pdf [firstpage_image] =>[orig_patent_app_number] => 340896 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/340896
Gravity concentrator having secondary wash of heavy fraction Apr 18, 1989 Issued
Array ( [id] => 2619773 [patent_doc_number] => 04950389 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-08-21 [patent_title] => 'Gravity concentrator' [patent_app_type] => 1 [patent_app_number] => 7/337043 [patent_app_country] => US [patent_app_date] => 1989-04-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 3 [patent_no_of_words] => 2685 [patent_no_of_claims] => 4 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 124 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/950/04950389.pdf [firstpage_image] =>[orig_patent_app_number] => 337043 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/337043
Gravity concentrator Apr 11, 1989 Issued
Array ( [id] => 2665187 [patent_doc_number] => 04983280 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1991-01-08 [patent_title] => 'Screening apparatus' [patent_app_type] => 1 [patent_app_number] => 7/333766 [patent_app_country] => US [patent_app_date] => 1989-04-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 6 [patent_no_of_words] => 1635 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 169 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/983/04983280.pdf [firstpage_image] =>[orig_patent_app_number] => 333766 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/333766
Screening apparatus Apr 4, 1989 Issued
Array ( [id] => 2741243 [patent_doc_number] => 04986900 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1991-01-22 [patent_title] => 'Sectional screen cylinder' [patent_app_type] => 1 [patent_app_number] => 7/332737 [patent_app_country] => US [patent_app_date] => 1989-04-04 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 9 [patent_no_of_words] => 4427 [patent_no_of_claims] => 38 [patent_no_of_ind_claims] => 5 [patent_words_short_claim] => 58 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/986/04986900.pdf [firstpage_image] =>[orig_patent_app_number] => 332737 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/332737
Sectional screen cylinder Apr 3, 1989 Issued
Array ( [id] => 2842733 [patent_doc_number] => 05104523 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1992-04-14 [patent_title] => 'Glass-plate sorting system' [patent_app_type] => 1 [patent_app_number] => 7/296055 [patent_app_country] => US [patent_app_date] => 1989-03-06 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 23 [patent_figures_cnt] => 32 [patent_no_of_words] => 10687 [patent_no_of_claims] => 7 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 304 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/05/104/05104523.pdf [firstpage_image] =>[orig_patent_app_number] => 296055 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/296055
Glass-plate sorting system Mar 5, 1989 Issued
Array ( [id] => 2613045 [patent_doc_number] => 04943368 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-07-24 [patent_title] => 'Nonmetallic abrasive blasting material recovery process including an electrostatic separation step' [patent_app_type] => 1 [patent_app_number] => 7/316085 [patent_app_country] => US [patent_app_date] => 1989-02-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 2 [patent_no_of_words] => 3369 [patent_no_of_claims] => 7 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 134 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/943/04943368.pdf [firstpage_image] =>[orig_patent_app_number] => 316085 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/316085
Nonmetallic abrasive blasting material recovery process including an electrostatic separation step Feb 26, 1989 Issued
Array ( [id] => 2620508 [patent_doc_number] => 04919798 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-04-24 [patent_title] => 'Method and an apparatus for sorting and ejecting articles' [patent_app_type] => 1 [patent_app_number] => 7/308279 [patent_app_country] => US [patent_app_date] => 1989-02-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 5 [patent_no_of_words] => 3116 [patent_no_of_claims] => 13 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 247 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/919/04919798.pdf [firstpage_image] =>[orig_patent_app_number] => 308279 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/308279
Method and an apparatus for sorting and ejecting articles Feb 8, 1989 Issued
Array ( [id] => 2693427 [patent_doc_number] => 05060806 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1991-10-29 [patent_title] => 'Variable-aperture screen' [patent_app_type] => 1 [patent_app_number] => 7/306106 [patent_app_country] => US [patent_app_date] => 1989-02-06 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 10 [patent_no_of_words] => 2760 [patent_no_of_claims] => 14 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 121 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/05/060/05060806.pdf [firstpage_image] =>[orig_patent_app_number] => 306106 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/306106
Variable-aperture screen Feb 5, 1989 Issued
07/302337 COLOR SORTING OF LUMBER Jan 26, 1989 Abandoned
07/301556 METHOD AND APPARATUS FOR SEPARATING BIO-REFUSE Jan 22, 1989 Abandoned
Array ( [id] => 2729978 [patent_doc_number] => 05022532 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1991-06-11 [patent_title] => 'Unit for grading produce, such as fruits' [patent_app_type] => 1 [patent_app_number] => 7/283995 [patent_app_country] => US [patent_app_date] => 1989-01-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 12 [patent_no_of_words] => 2647 [patent_no_of_claims] => 28 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 172 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/05/022/05022532.pdf [firstpage_image] =>[orig_patent_app_number] => 283995 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/283995
Unit for grading produce, such as fruits Jan 10, 1989 Issued
Array ( [id] => 2550840 [patent_doc_number] => 04944411 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-07-31 [patent_title] => 'Position indicator device for conveyed object' [patent_app_type] => 1 [patent_app_number] => 7/290228 [patent_app_country] => US [patent_app_date] => 1988-12-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 3 [patent_no_of_words] => 2702 [patent_no_of_claims] => 2 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 188 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/944/04944411.pdf [firstpage_image] =>[orig_patent_app_number] => 290228 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/290228
Position indicator device for conveyed object Dec 26, 1988 Issued
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