ExamPat

William Charles Doerrler

USPTO Patent Examiner·Active 2012 to 2026

William Charles Doerrler is a USPTO patent examiner who has handled 115 ex parte reexaminations between 2012 and 2026, with 15 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
9
26

Technology mix

Mechanical Engineering45 (38%)
Mechanical & Manufacturing29 (25%)
Life Sciences & Consumer16 (14%)
Physics & Instruments12 (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, from 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

vs. all examiners

Certificate outcome distribution

Event-to-event timing (median)

Recent reexaminations (showing 25 of 115)

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Control #FiledPatentTitlePendencyStatus
90/016,386Jun 8, 202611,554,724BICYCLE RACK WITH C-HOOPS—Open
90/016,269May 12, 202612,399,070FLOATING THERMOMETER—Open
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—Closed
90/016,007Feb 26, 20268,364,356DRIVE CONTROL SYSTEM FOR A VEHICLE AND METHOD—Open
90/016,010Feb 26, 20268,047,760INTEGRAL POWER OR ELECTRICAL CONDUIT COUPLER—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 ADJUSTMENT9 moClosed
90/015,433Aug 6, 202510,385,662WELL FRACTURING MANIFOLD APPARATUS10 moClosed
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
90/019,862Feb 25, 20259,709,328UNIDIRECTIONAL MULTI-PATH LUMBER KILNS8 moClosed
90/019,863Feb 25, 202510,203,156UNIDIRECTIONAL 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

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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.