ExamPat

William Charles Doerrler

USPTO Patent Examiner·Active 2012 to 2026

William Charles Doerrler is a USPTO patent examiner who has handled 113 ex parte reexaminations between 2012 and 2026, with 16 currently open. These reexams concentrate in Mechanical Engineering, Mechanical & Manufacturing, and Life Sciences & Consumer. 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
4
13
13
14
5
15
8
16
9
17
6
18
6
19
3
20
4
21
8
22
13
23
9
24
14
25
7
26

Technology mix

Mechanical Engineering45 (39%)
Mechanical & Manufacturing28 (24%)
Life Sciences & Consumer16 (14%)
Physics & Instruments11 (10%)
Construction & Mining10 (9%)
Electrical & Electronic4 (3%)

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 113)

Control #FiledPatentTitlePendencyStatus
90/016,240May 2, 202612,245,610Freeze Dryers and Drying Processes for Materials with Low Water Content—Open
90/016,168Apr 6, 202612,473,192ANTI-SIPHONAGE AND ANTI-OVERFLOW FUEL PUMP STRUCTURE—Open
90/016,010Feb 26, 20268,047,760INTEGRAL POWER OR ELECTRICAL CONDUIT COUPLER—Open
90/016,007Feb 26, 20268,364,356DRIVE CONTROL SYSTEM FOR A VEHICLE AND METHOD—Open
90/015,960Feb 13, 202611,408,601ILLUMINATION DEVICE WITH COUPLE LAMP TUBES HAVING TEMPERATURE AND POWER ADJUSTMENT FUNCTIONS—Open
90/015,938Feb 2, 20269,801,245LIGHT FIXTURE—Open
90/015,913Jan 26, 202611,906,115LED TUBE LAMP—Open
90/015,760Dec 9, 20258,267,537BACKLIGHT UNIT AND DISPLAY DEVICE HAVING THE SAME—Open
90/015,718Dec 1, 202511,673,516PROTECTIVE FRAME—Open
90/015,732Nov 27, 202512,420,443BREAD SLICER—Open
90/015,592Oct 9, 202511,611,222PORTABLE VEHICLE BATTERY JUMP STARTER WITH AIR PUMP—Open
90/015,544Sep 25, 20259,857,805FLUID MONITORING AND CONTROL SYSTEM—Open
90/015,515Sep 15, 202511,285,354MULTIPLE WEIGHT ADJUSTABLE DUMBBELL WITH SINGLE HAND WEIGHT SELECTION ADJUSTMENT—Open
90/015,433Aug 6, 202510,385,662WELL FRACTURING MANIFOLD APPARATUS—Open
90/015,394Jul 17, 202511,061,450COOLING APPARATUS FOR ELECTRONIC COMPONENTS10 moClosed
90/015,395Jul 17, 202510,509,446COOLING APPARATUS FOR ELECTRONIC COMPONENTS9 moClosed
90/019,985Jun 3, 202512,313,084NECK HANGING FAN—Open
90/019,956May 12, 20258,328,128AIRCRAFT8 moClosed
90/019,912Apr 14, 20259,535,038REDUCTION OF AERATION INTERFERENCE IN AN ULTRASONIC FLUID SENSING SYSTEM10 moClosed
90/019,863Feb 25, 202510,203,156UNIDIRECTIONAL MULTI-PATH LUMBER KILNS8 moClosed
90/019,862Feb 25, 20259,709,328UNIDIRECTIONAL MULTI-PATH LUMBER KILNS8 moClosed
90/019,752Dec 3, 202411,812,242Electronic Device With Multiple Modes of Attachment12 moClosed
90/019,698Nov 9, 202411,566,729HVACR PIPE14 moClosed
90/019,706Oct 18, 202411,408,585WATERPROOF AND SHATTERPROOF LIGHT STRING—Open
90/019,693Oct 4, 20249,398,757LABORATORY ANIMAL STIMULATORY ENRICHMENT PRODUCT10 moClosed

Other USPTO reexam examiners

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