Also listed on AGC Si-Tech Co., Ltd., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Jan 19, 2043 · High confidence
20-year base term ends Feb 22, 2041
Held by AGC Inc. and AGC Si-Tech Co., Ltd.
Filed Aug 22, 2022 as application 17/892,359 · Granted Jun 23, 2026
Base term plus 696 days of patent term adjustment (USPTO delay)
Today
2021
2043
Clock starts
Feb 22, 2021
Feb 22, 2021
Term ends
Jan 19, 2043
Jan 19, 2043
Granted
Jun 23, 2026
Jun 23, 2026
base term
patent term adjustment
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
696
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
0 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
2
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term runs 696 days past its 20-year base term on prosecution delay. 0 of 3 maintenance fees are paid so far. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Feb 22, 2021, when application PCT/JP2021/006698, the earliest non-provisional in its chain, was filed (this one was filed Aug 22, 2022) | Feb 22, 2041 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +696 days, USPTO patent term adjustment record | Jan 19, 2043 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jan 19, 2043 | High confidence |
This family
| US 12,662,386 | this patent Jan 2043 | Jan 2043 |
1 of 2 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Aug 22, 2022 Reel 60856, frame 201 | Kamo, Hiromichi; Kondo, Masashi; Katayama, Hajime | AGC Inc.; AGC Si-Tech Co., Ltd. | Assignment of Assignor's Interest |
| Aug 22, 2022 reel/frame not recorded | Kamo, Hiromichi; Katayama, Hajime; Kondo, Masashi | AGC Inc. | Assignment of Assignor's Interest |
| Aug 22, 2022 reel/frame not recorded | Kamo, Hiromichi; Katayama, Hajime; Kondo, Masashi | AGC Si-Tech Co., Ltd. | Assignment of Assignor's Interest |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Jan 2043
Term ends Jan 19, 2043. Maintenance fees still fall due before then
Note
The 696 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
We have no citation count for this patent yet. That is not the same as never having been cited.
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.