Taiwan Semiconductor Manufacturing Company Limited
Ex parte reexamination requester·6 ex parte reexams
Taiwan Semiconductor Manufacturing Company Limited has requested 6 USPTO ex parte reexaminations, with 6 currently open. It most often challenges patents owned by United Microelectronics Corp., Panasonic Corporation, and United Microelectronics Corp. Corp.. ExamPat indexes the full prosecution record for each proceeding, including office-action grounds, certificate outcomes, and downstream PTAB and Federal Circuit decisions.
Filings by year
Top patent owners challenged
Outcome track record
How this requester's challenges resolve: claims confirmed, amended, mixed, or fully canceled.
- Certificate outcome split across every bucket
- Share of challenges that canceled claims
Challenge metrics
Cancellation rate, average pendency, and the open/closed split across every reexam this requester has filed.
- Outcome rate of closed challenges
- Average pendency in months
Examiners & defense counsel
Which examiners decide this requester's challenges, and which firms defend the targeted patents.
- Most frequent examiners
- Top opposing counsel
Recent reexaminations (6)
| Control # | Filed | Patent | Title | Owner | Status |
|---|---|---|---|---|---|
| 90/015,753 | Dec 3, 2025 | 9,093,473 | METHOD FOR FABRICATING METAL-OXIDE SEMICONDUCTOR TRANSISTOR | United Microelectronics Corp. Corp. | Open |
| 90/015,752 | Dec 3, 2025 | 9,147,747 | SEMICONDUCTOR STRUCTURE WITH HARD MASK DISPOSED ON THE GATE STRUCTURE | Marlin Semiconductor Limited | Open |
| 90/015,750 | Dec 3, 2025 | 9,953,880 | SEMICONDUCTOR DEVICE AND METHOD FOR FABRICATING THE SAME | United Microelectronics Corp. | Open |
| 90/015,751 | Dec 3, 2025 | 9,184,292 | SEMICONDUCTOR STRUCTURE WITH DIFFERENT FINS OF FINFETS | United Microelectronics Corp. | Open |
| 90/015,704 | Nov 20, 2025 | 8,198,686 | SEMICONDUCTOR DEVICE | Panasonic Corporation | Open |
| 90/015,674 | Nov 12, 2025 | 8,907,425 | SEMICONDUCTOR DEVICE | Panasonic Corporation | Open |
See the full reexam picture for Taiwan Semiconductor Manufacturing Company Limited
Certificate outcomes, pendency, and the parties and examiners behind these cases. Free to sign up.