Term ends Dec 23, 2030 · Low confidence
20-year base term ends Aug 25, 2030
Grace period ended Oct 28, 2026 · no payment on record as of the Nov 10, 2026 fee file · lapse expected
Held by Sekisui Polymatech Co., Ltd.
Filed Mar 1, 2012 as application 13/393,568 · Granted Oct 28, 2014
Base term plus 120 days of patent term adjustment (USPTO delay)
Today
2010
2030
Clock starts
Aug 25, 2010
Aug 25, 2010
Term ends
Dec 23, 2030
Dec 23, 2030
Granted
Oct 28, 2014
Oct 28, 2014
base term
patent term adjustment
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
120
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 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 120 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. Confidence: Low: the grace period for its third maintenance fee ended Oct 28, 2026 with no payment on record. 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 Aug 25, 2010, when application PCT/JP2010/064365, the earliest non-provisional in its chain, was filed (this one was filed Mar 1, 2012) | Aug 25, 2030 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +120 days, USPTO patent term adjustment record | Dec 23, 2030 | 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 | No fee event states this; the fee state is read from the payments the fee record holds; the fee record shows no payment for this window, and USPTO's status still reads "Patented Case"; the grace period ended with no payment on record in the fee file | grace period ended Oct 28, 2026 | Low confidence |
| Computed term end | The steps above, in order | Dec 23, 2030 | Low confidence |
This family
| US 8,872,038 | this patent Dec 2030 | Dec 2030 |
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 |
|---|---|---|---|
| Mar 1, 2012 Reel 27788, frame 68 | Nakaone, Yutaka | Polymatech Co., Ltd. | Assignment of Assignor's Interest |
| Mar 31, 2015 Reel 35301, frame 276 | Polymatech Co., Ltd. | Polymatech Japan Co., Ltd. | Assignment of Assignor's Interest |
| Jun 1, 2018 Reel 45964, frame 914 | Polymatech Japan Co., Ltd. | Sekisui Polymatech Co., Ltd. | Change of Name |
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
Oct 28
Grace period ended Oct 28, 2026 with no payment on record. The term ends early once USPTO posts the lapse
Dec 2030
Term ends Dec 23, 2030.
Note
The 120 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
5
later US patents cite this one
That is below the median of utility patents granted in 2014 in our data, the only group it is compared against.
How we rank
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.