Term ends no later than May 22, 2030 · Low confidence
20-year base term ends Mar 30, 2030
Grace period ended Oct 28, 2026 · no payment on record as of the Nov 10, 2026 fee file · lapse expected
Held by Fiberleantm Technologies Limited
Filed Oct 14, 2011 as application 13/138,647 · Granted Oct 28, 2014
Base term plus 53 days of patent term adjustment (USPTO delay)
Today
2010
2030
Clock starts
Mar 30, 2010
Mar 30, 2010
Ends no later than
May 22, 2030
May 22, 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
53
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
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.
5
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 53 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. 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 Mar 30, 2010, when application PCT/EP2010/054231, the earliest non-provisional in its chain, was filed (this one was filed Oct 14, 2011) | Mar 30, 2030 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +53 days, USPTO patent term adjustment record | May 22, 2030 | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 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 | no later than May 22, 2030 | Low confidence |
This family
| US 8,871,057 | this patent no later than May 2030 | no later than May 2030 |
| US 10,301,774 | In force no later than Mar 2030 | no later than Mar 2030 |
| US 10,982,387 | Lapsed on the fee record Apr 2025 | Apr 2025 |
| Application 17/193,338 | Abandoned not computed | not computed |
4 of 5 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 14, 2011 Reel 27062, frame 975 | Gane, Patrick A; Schoelkopf, Joachim; Gantenbein, Daniel; Schenker, Michel; Pohl, Michael; Kubler, Beat | Omya Development AG | Assignment of Assignor's Interest |
| Oct 14, 2013 Reel 31406, frame 917 | Omya Development AG | Omya International AG | Change of Name |
| Nov 14, 2016 Reel 40308, frame 951 | Fiberleantm Technologies Limited | Fiberlean Technologies Limited | Change of Name |
| Dec 21, 2016 Reel 41119, frame 481 | Omya International AG | Omya-Holding AG | Assignment of Assignor's Interest |
| Dec 21, 2016 Reel 41119, frame 621 | Omya-Holding AG | Fiberleantm Technologies Limited | 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.
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
May 2030
Term ends no later than May 22, 2030.
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Note
The 53 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than May 22, 2030. We will not guess the cap.
Citations
58
later US patents cite this one
That is top 10% 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
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. 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.