Matthew John Kasztejna
USPTO Patent Examiner·Active 2023 to 2026
Matthew John Kasztejna is a USPTO patent examiner who has handled 36 ex parte reexaminations between 2023 and 2026, with 30 currently open. These reexams concentrate in Life Sciences & Consumer, Mechanical & Manufacturing, and Mechanical Engineering. 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
Technology mix
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 36)
| Control # | Filed | Patent | Title | Pendency | Status |
|---|---|---|---|---|---|
| 90/016,362 | May 31, 2026 | 11,885,358 | BLIND FASTENER AND METHOD OF INSTALLATION THEREOF | — | Open |
| 90/016,257 | May 8, 2026 | 11,338,835 | HIGH LOAD CAPACITY COLLAPSIBLE CARTS | — | Open |
| 90/016,127 | Apr 2, 2026 | 12,440,321 | ATTACHMENT FOR AN ORAL CARE DEVICE HANDLE | — | Open |
| 90/016,045 | Mar 13, 2026 | 11,173,016 | Fixation Base and Guides for Dental Prosthesis Installation | — | Closed |
| 90/016,046 | Mar 13, 2026 | 11,576,755 | Fixation Base and Guides for Dental Prosthesis Installation | — | Closed |
| 90/015,969 | Feb 23, 2026 | 12,304,675 | MATERIAL ENCAPSULATION DEVICE | — | Open |
| 90/015,983 | Feb 20, 2026 | 12,036,079 | ATTACHMENT FOR AN ORAL CARE DEVICE HANDLE | — | Open |
| 90/015,921 | Jan 28, 2026 | 11,703,060 | NECK-HANGING FAN | — | Open |
| 90/015,766 | Dec 10, 2025 | 12,161,473 | ELECTROCARDIOGRAPHY PATCH | — | Open |
| 90/015,738 | Dec 2, 2025 | 12,484,745 | HANDHELD EXTRACTION CLEANER WITH LIQUID MOVEMENT MITIGATION | — | Open |
| 90/015,626 | Oct 22, 2025 | 9,332,766 | INDUSTRIAL BAGUETTE TRAY | — | Open |
| 90/015,500 | Sep 5, 2025 | 11,300,260 | ELEVATED STRUCTURE-MOUNTED LIGHTING SYSTEM | — | Open |
| 90/015,470 | Aug 29, 2025 | 11,912,326 | WHEELED CART WITH BRAKING SYSTEM | — | Open |
| 90/015,405 | Jul 24, 2025 | 11,920,338 | FEED PAD WATER COLLECTION SYSTEM AND METHOD | — | Open |
| 90/015,397 | Jul 21, 2025 | 9,918,522 | RATCHET BELT SYSTEM AND RELATED ACCESSORIES | — | Open |
| 90/019,995 | Jun 13, 2025 | 8,287,482 | INTRAOCULAR IMPLANTS AND METHODS AND KITS THEREFOR | — | Open |
| 90/019,943 | May 21, 2025 | 12,157,606 | Re-configurable and re-sizable modular storage container system | — | Open |
| 90/019,928 | Apr 24, 2025 | 12,037,162 | CONTAINER APPARATUS | — | Open |
| 90/019,895 | Mar 31, 2025 | 7,156,694 | ELECTRICAL OUTLET PLUG STRIP | — | Open |
| 90/019,855 | Feb 21, 2025 | 8,593,349 | MINIATURE ANTENNA HAVING A VOLUMETRIC STRUCTURE | 11 mo | Closed |
| 90/019,825 | Jan 21, 2025 | 11,653,863 | FLUID CONTROL DEVICES AND METHODS OF USING THE SAME | — | Open |
| 90/019,823 | Jan 21, 2025 | 11,529,081 | FLUID CONTROL DEVICES AND METHODS OF USING THE SAME | — | Open |
| 90/019,824 | Jan 21, 2025 | 11,903,709 | FLUID CONTROL DEVICES AND METHODS OF USING THE SAME | — | Open |
| 90/019,728 | Nov 13, 2024 | 12,036,186 | ADJUSTABLE BABY SELF FEEDING PILLOW | — | Open |
| 90/019,649 | Sep 9, 2024 | 11,660,056 | Swinging Shielding System For Use With A Radiation Source | — | Open |
Get the full reexam analytics
Compare Matthew John Kasztejna against the full corpus, see the certificate-outcome split, drill into event timing, filter the case list, and export. Free to sign up.