Search

Tom Y. Chang

Examiner (ID: 16110, Phone: (571)270-5938 , Office: P/2456 )

Most Active Art Unit
2456
Art Unit(s)
2455, 2442, 2456
Total Applications
500
Issued Applications
251
Pending Applications
42
Abandoned Applications
214

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 1583650 [patent_doc_number] => 06358417 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2002-03-19 [patent_title] => 'Non-woven depth filter element' [patent_app_type] => B1 [patent_app_number] => 09/296070 [patent_app_country] => US [patent_app_date] => 1999-04-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 4 [patent_no_of_words] => 3843 [patent_no_of_claims] => 5 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 165 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/358/06358417.pdf [firstpage_image] =>[orig_patent_app_number] => 09296070 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/296070
Non-woven depth filter element Apr 20, 1999 Issued
09/230167 METHOD FOR MIXING VISCOUS MATTER BY GENERATING SHAPED ACOUSTIC CONVECTION Apr 19, 1999 Abandoned
Array ( [id] => 4402882 [patent_doc_number] => 06299768 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-10-09 [patent_title] => 'Magnetic treatment apparatus for water' [patent_app_type] => 1 [patent_app_number] => 9/292399 [patent_app_country] => US [patent_app_date] => 1999-04-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 7 [patent_no_of_words] => 2970 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 188 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/299/06299768.pdf [firstpage_image] =>[orig_patent_app_number] => 292399 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/292399
Magnetic treatment apparatus for water Apr 14, 1999 Issued
09/287423 METHOD OF PREPARING GLASS FIBER FILTER Apr 6, 1999 Abandoned
Array ( [id] => 4403874 [patent_doc_number] => 06299842 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-10-09 [patent_title] => 'Biological sampling and storage container utilizing a desiccant' [patent_app_type] => 1 [patent_app_number] => 9/262903 [patent_app_country] => US [patent_app_date] => 1999-03-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 6 [patent_no_of_words] => 2553 [patent_no_of_claims] => 18 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 86 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/299/06299842.pdf [firstpage_image] =>[orig_patent_app_number] => 262903 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/262903
Biological sampling and storage container utilizing a desiccant Mar 4, 1999 Issued
09/125322 CENTRIFUGE FOR MEASURING HAEMATOCRIT Mar 4, 1999 Abandoned
Array ( [id] => 6900704 [patent_doc_number] => 20010022287 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2001-09-20 [patent_title] => 'FILTERING DEVICE' [patent_app_type] => new [patent_app_number] => 09/259494 [patent_app_country] => US [patent_app_date] => 1999-02-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 16 [patent_figures_cnt] => 16 [patent_no_of_words] => 8696 [patent_no_of_claims] => 10 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 99 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] => publications/A1/0022/20010022287.pdf [firstpage_image] =>[orig_patent_app_number] => 09259494 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/259494
Filtering device Feb 25, 1999 Issued
Array ( [id] => 4403398 [patent_doc_number] => 06264895 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-07-24 [patent_title] => 'Evaporator' [patent_app_type] => 1 [patent_app_number] => 9/258605 [patent_app_country] => US [patent_app_date] => 1999-02-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 10 [patent_no_of_words] => 2636 [patent_no_of_claims] => 28 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 112 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/264/06264895.pdf [firstpage_image] =>[orig_patent_app_number] => 258605 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/258605
Evaporator Feb 25, 1999 Issued
Array ( [id] => 4400037 [patent_doc_number] => 06171490 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-01-09 [patent_title] => 'Water purifier with a rotating magnet' [patent_app_type] => 1 [patent_app_number] => 9/258540 [patent_app_country] => US [patent_app_date] => 1999-02-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 8 [patent_no_of_words] => 1677 [patent_no_of_claims] => 2 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 101 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/171/06171490.pdf [firstpage_image] =>[orig_patent_app_number] => 258540 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/258540
Water purifier with a rotating magnet Feb 25, 1999 Issued
Array ( [id] => 4264747 [patent_doc_number] => 06280375 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-08-28 [patent_title] => 'Flow-through centrifuge for centrifuging biological fluids' [patent_app_type] => 1 [patent_app_number] => 9/233311 [patent_app_country] => US [patent_app_date] => 1999-01-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 10 [patent_no_of_words] => 4801 [patent_no_of_claims] => 26 [patent_no_of_ind_claims] => 5 [patent_words_short_claim] => 161 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/280/06280375.pdf [firstpage_image] =>[orig_patent_app_number] => 233311 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/233311
Flow-through centrifuge for centrifuging biological fluids Jan 18, 1999 Issued
09/224985 DISPOSABLE CONVERTIBLE CONE/BASKET FILTER Jan 3, 1999 Abandoned
Array ( [id] => 4266416 [patent_doc_number] => 06209727 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-04-03 [patent_title] => 'Separation device having abutment rings as an outer cover' [patent_app_type] => 1 [patent_app_number] => 9/125829 [patent_app_country] => US [patent_app_date] => 1998-12-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 14 [patent_no_of_words] => 2993 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 172 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/209/06209727.pdf [firstpage_image] =>[orig_patent_app_number] => 125829 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/125829
Separation device having abutment rings as an outer cover Dec 9, 1998 Issued
Array ( [id] => 4337074 [patent_doc_number] => 06284145 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-09-04 [patent_title] => 'Screen plate for screening of a pulp suspension and method to separate the same' [patent_app_type] => 1 [patent_app_number] => 9/202142 [patent_app_country] => US [patent_app_date] => 1998-12-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 4 [patent_no_of_words] => 2484 [patent_no_of_claims] => 19 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 126 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/284/06284145.pdf [firstpage_image] =>[orig_patent_app_number] => 202142 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/202142
Screen plate for screening of a pulp suspension and method to separate the same Dec 8, 1998 Issued
Array ( [id] => 4219272 [patent_doc_number] => 06164809 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2000-12-26 [patent_title] => 'Counter-flow asphalt plant with independently rotatable dryer and mixer' [patent_app_type] => 1 [patent_app_number] => 9/201687 [patent_app_country] => US [patent_app_date] => 1998-11-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 11 [patent_no_of_words] => 8128 [patent_no_of_claims] => 26 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 263 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/164/06164809.pdf [firstpage_image] =>[orig_patent_app_number] => 201687 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/201687
Counter-flow asphalt plant with independently rotatable dryer and mixer Nov 29, 1998 Issued
Array ( [id] => 4407073 [patent_doc_number] => 06193406 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-02-27 [patent_title] => 'Method and apparatus for mixing pulp a suspension with a fluid medium with a freely rotatable mixing rotor' [patent_app_type] => 1 [patent_app_number] => 9/194358 [patent_app_country] => US [patent_app_date] => 1998-11-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 3 [patent_no_of_words] => 2673 [patent_no_of_claims] => 10 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 99 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/193/06193406.pdf [firstpage_image] =>[orig_patent_app_number] => 194358 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/194358
Method and apparatus for mixing pulp a suspension with a fluid medium with a freely rotatable mixing rotor Nov 24, 1998 Issued
09/188756 HIGH FLOW HIGH RECOVERY SPIRALLY WOUND FILTRATION ELEMENT Nov 8, 1998 Abandoned
Array ( [id] => 4226393 [patent_doc_number] => 06117318 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2000-09-12 [patent_title] => 'Rotating motorized conveyor pulley drum having a magnetic particulate trap' [patent_app_type] => 1 [patent_app_number] => 9/187867 [patent_app_country] => US [patent_app_date] => 1998-11-06 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 5 [patent_no_of_words] => 1868 [patent_no_of_claims] => 5 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 90 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/117/06117318.pdf [firstpage_image] =>[orig_patent_app_number] => 187867 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/187867
Rotating motorized conveyor pulley drum having a magnetic particulate trap Nov 5, 1998 Issued
Array ( [id] => 4389380 [patent_doc_number] => 06296764 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-10-02 [patent_title] => 'Apparatus for mixing and separating particulate matter from a fluid' [patent_app_type] => 1 [patent_app_number] => 9/185606 [patent_app_country] => US [patent_app_date] => 1998-11-04 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 14 [patent_figures_cnt] => 22 [patent_no_of_words] => 11798 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 225 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/296/06296764.pdf [firstpage_image] =>[orig_patent_app_number] => 185606 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/185606
Apparatus for mixing and separating particulate matter from a fluid Nov 3, 1998 Issued
Array ( [id] => 4172577 [patent_doc_number] => 06036871 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2000-03-14 [patent_title] => 'Method and device for separating heavier from lighter parts of aqueous slurries by means of centrifugal force effects' [patent_app_type] => 1 [patent_app_number] => 9/177597 [patent_app_country] => US [patent_app_date] => 1998-10-23 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 8 [patent_no_of_words] => 4859 [patent_no_of_claims] => 13 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 161 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/036/06036871.pdf [firstpage_image] =>[orig_patent_app_number] => 177597 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/177597
Method and device for separating heavier from lighter parts of aqueous slurries by means of centrifugal force effects Oct 22, 1998 Issued
09/142006 WORM MACHINE Oct 22, 1998 Abandoned
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