Term ends Nov 20, 2031 · High confidence
20-year base term ends Mar 31, 2031
Held by Omya International AG
Filed Oct 12, 2012 as application 13/635,928 · Granted Apr 7, 2015
Base term plus 234 days of patent term adjustment (USPTO delay)
Today
2011
2031
Clock starts
Mar 31, 2011
Mar 31, 2011
Term ends
Nov 20, 2031
Nov 20, 2031
Granted
Apr 7, 2015
Apr 7, 2015
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
234
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 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.
32
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 234 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 Mar 31, 2011, when application PCT/EP2011/054994, the earliest non-provisional in its chain, was filed (this one was filed Oct 12, 2012) | Mar 31, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +234 days, USPTO patent term adjustment record | Nov 20, 2031 | 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Nov 20, 2031 | High confidence |
This family
| US 8,889,068 | In force Dec 2026 | Dec 2026 |
| US 9,944,815 | Lapsed on the fee record Apr 2026 | Apr 2026 |
| US 8,999,284 | this patent Nov 2031 | Nov 2031 |
| US 10,221,316 | In force Jun 2031 | Jun 2031 |
| US 8,974,877 | In force Sep 2031 | Sep 2031 |
| US 9,029,448 | In force Nov 2031 | Nov 2031 |
| US 8,877,127 | Term ended Jan 2026 | Jan 2026 |
| US 10,221,317 | In force Sep 2032 | Sep 2032 |
8 of 32 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 |
|---|---|---|---|
| Oct 12, 2012 Reel 29120, frame 728 | Pohl, Michael; Rainer, Christian; Primosch, Gernot | Omya Development AG | Assignment of Assignor's Interest |
| Oct 14, 2013 Reel 31406, frame 917 | Omya Development AG | Omya International AG | 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.
What's changing
Nov 2031
Term ends Nov 20, 2031. No further fees fall due before then
Note
The 234 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
8
later US patents cite this one
That is above the median of utility patents granted in 2015 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.