ExamPat

Christina Y Leung

USPTO Patent Examiner·Active 2012 to 2026

Christina Y Leung is a USPTO patent examiner who has handled 42 ex parte reexaminations between 2012 and 2026, with 20 currently open. These reexams concentrate in Electrical & Electronic, Physics & Instruments, and Mechanical & Manufacturing. ExamPat indexes the full prosecution record for each of these cases, including office-action grounds, certificate outcomes, and downstream PTAB and federal-circuit decisions.

Filings by year

6
12
2
13
3
14
2
16
2
17
2
20
1
21
1
22
1
23
13
25
10
26

Technology mix

Electrical & Electronic19 (44%)
Physics & Instruments16 (37%)
Mechanical & Manufacturing3 (7%)
Mechanical Engineering2 (5%)
Life Sciences & Consumer2 (5%)
Chemistry & Materials1 (2%)

Compare against all examiners

Eight side-by-side metrics: case volume, pendency, OAs per reexam, rejection mix, SNQ denial rate, certification rate, and PTAB appeal rate, with a Δ column showing where this examiner runs higher or lower than the corpus.

  • Average and median pendency, both for this examiner and the corpus
  • Rejection basis split (102 / 103 / 112) head-to-head
  • Certification, SNQ denial, and PTAB appeal rates

Certificate outcome distribution

How this examiner's certificates split across the six possible outcomes: all claims confirmed, confirmed with amendment, confirmed with new claims, mixed, or all claims canceled. Includes share comparison to the corpus distribution.

  • Count and share for each of the six outcome buckets
  • Δ vs. corpus distribution in percentage points
  • Useful for setting realistic patent-owner expectations

Event-to-event timing

Median time for this examiner's cases at each prosecution stage — filing to first office action, filing to NIRC, and filing to certificate — with corpus comparison and sample size.

  • Median in months per transition
  • Side-by-side with the corpus median
  • n column showing how many of this examiner's cases completed each transition

Recent reexaminations (showing 25 of 42)

Control #FiledPatentTitlePendencyStatus
90/016,232May 1, 20268,440,517FINFET AND METHOD OF FABRICATING THE SAME—Open
90/016,214Apr 27, 20269,379,215FIN FIELD EFFECT TRANSISTOR—Open
90/016,213Apr 27, 20269,209,300FIN FIELD EFFECT TRANSISTOR—Open
90/016,164Apr 4, 20267,705,948LIQUID CRYSTAL DISPLAY DEVICE—Open
90/016,099Mar 30, 202612,068,2503D NAND MEMORY DEVICE AND METHOD OF FORMING THE SAME—Open
90/016,044Mar 12, 20268,400,835NON-VOLATILE SEMICONDUCTOR MEMORY—Open
90/016,025Mar 5, 202612,087,871MICROSTRUCTURE ENHANCED ABSORPTION PHOTOSENSITIVE DEVICES—Closed
90/015,962Feb 13, 202611,621,360MICROSTRUCTURE ENHANCED ABSORPTION PHOTOSENSITIVE DEVICES—Closed
90/015,944Feb 3, 202610,446,700MICROSTRUCTURE ENHANCED ABSORPTION PHOTOSENSITIVE DEVICES—Open
90/015,945Feb 3, 202610,468,543MICROSTRUCTURE ENHANCED ABSORPTION PHOTOSENSITIVE DEVICES—Open
90/015,821Dec 23, 20259,055,868SYSTEM AND METHOD FOR VOICE CONTROL OF MEDICAL DEVICES—Open
90/015,810Dec 22, 20259,534,744LIGHT EMITTING APPARATUS—Open
90/015,812Dec 22, 20258,506,122LENS AND LIGHT EMITTING APPARATUS HAVING THE SAME—Open
90/015,552Dec 4, 20256,291,861SEMICONDUCTOR DEVICE AND METHOD FOR PRODUCING THE SAME—Open
90/015,751Dec 3, 20259,184,292SEMICONDUCTOR STRUCTURE WITH DIFFERENT FINS OF FINFETS—Open
90/015,691Nov 19, 20257,923,764SEMICONDUCTOR DEVICE AND METHOD FOR FABRICATING THE SAME—Open
90/015,688Nov 14, 20258,253,180SEMICONDUCTOR DEVICE—Open
90/015,690Nov 14, 20258,587,076SEMICONDUCTOR DEVICE—Open
90/015,689Nov 14, 20257,579,227SEMICONDUCTOR DEVICE AND METHOD FOR FABRICATING THE SAME—Open
90/015,446Aug 13, 20258,647,588Tip Tray Assembly For Optical Sensors—Open
90/019,979May 30, 20258,941,137LIGHT EMITTING DIODE PACKAGE AND METHOD OF MANUFACTURE—Open
90/019,921Apr 21, 20258,314,547OPTO-ELECTRONIC COMPONENT10 moClosed
90/019,851Feb 14, 20257,749,641SECONDARY LITHIUM ION CELL OR BATTERY, AND PROTECTING CIRCUIT, ELECTRONIC DEVICE, AND CHARGING DEVICE OF THE SAME—Open
90/015,268Aug 7, 20236,821,540Process For Treating Vegetables And Fruit Before Cooking9 moClosed
90/014,965Feb 25, 20228,624,844Portable Computer with Multiple Display Configurations14 moClosed

Other USPTO reexam examiners

Get the full reexam analytics

Compare Christina Y Leung against the full corpus, see the certificate-outcome split, drill into event timing, filter the case list, and export. Free to sign up.