Lapsed Apr 20, 2025 on the fee record · Medium confidence
20-year base term ends Mar 30, 2030
Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 10,294,371, US 10,301,774, US 8,871,056, US 8,871,057), so the cap could be lower.
First maintenance fee unpaid; grace period ended.
Held by Fiberlean Technologies Limited
Filed Apr 11, 2019 as application 16/381,754 · Granted Apr 20, 2021
Base term, 20 years from filing
Today
Lapsed Apr 20, 2025
2010
2030
Clock starts
Mar 30, 2010
Mar 30, 2010
No longer in force
Apr 20, 2025
Apr 20, 2025
Granted
Apr 20, 2021
Apr 20, 2021
Term would have run to
Mar 30, 2030
Mar 30, 2030
base term
after the term ends
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
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 10,294,371, US 10,301,774, US 10,975,242, US 8,871,056, US 8,871,057, to Mar 30, 2030. The term already ends on or before that date, so the cap shortened nothing.
0 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. 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.
Its term would have run to Mar 30, 2030: its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. Confidence: Medium. 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 Apr 11, 2019) | Mar 30, 2030 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,294,371, US 10,301,774, US 10,975,242, US 8,871,056, US 8,871,057) | resolves to Mar 30, 2030, no earlier than this term, so no change | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 2 maintenance fees paid | lapsed Apr 20, 2025 | High confidence |
| Computed term end | The steps above, in order | Apr 20, 2025 | Medium confidence |
This family
| US 8,871,057 | Grace period ended 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 | this patent 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 |
|---|---|---|---|
| Jun 14, 2019 Reel 49467, frame 649 | Omya International AG | Omya-Holding AG | Assignment of Assignor's Interest |
| Jun 14, 2019 Reel 49467, frame 710 | Omya-Holding AG | Fiberleantm Technologies Limited | Assignment of Assignor's Interest |
| Jun 14, 2019 Reel 49476, frame 260 | Fiberleantm Technologies Limited | Fiberlean Technologies Limited | Change of Name |
| Jun 14, 2019 Reel 49476, frame 502 | Gane, Patrick A.c.; Schoelkopf, Joachim; Gantenbein, Daniel; Schenker, Michel; Pohl, Michael; Kubler, Beat | Omya Development AG | Assignment of Assignor's Interest |
| Jun 14, 2019 Reel 49476, frame 636 | 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.
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Alerts on its grants, lapses and transfers.
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 10,294,371, US 10,301,774, US 10,975,242, US 8,871,056, US 8,871,057, ends no earlier than this term, so it caps nothing.
Citations
1
later US patent cites this one
That is below the median of utility patents granted in 2021 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.