Term ends Nov 2, 2030 · High confidence
20-year base term ends May 17, 2030
Held by Fiberlean Technologies Limited
Filed Mar 14, 2011 as application 12/994,356 · Granted Sep 8, 2015
Base term plus 169 days of patent term adjustment (USPTO delay)
Today
2010
2030
Clock starts
May 17, 2010
May 17, 2010
Term ends
Nov 2, 2030
Nov 2, 2030
Granted
Sep 8, 2015
Sep 8, 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
169
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.
9
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 169 days past its 20-year base term on prosecution delay. 2 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 May 17, 2010, when application PCT/GB2010/000982, the earliest non-provisional in its chain, was filed (this one was filed Mar 14, 2011) | May 17, 2030 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +169 days, USPTO patent term adjustment record | Nov 2, 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Nov 2, 2030 | High confidence |
This family
| US 9,127,405 | this patent Nov 2030 | Nov 2030 |
| US 8,231,764 | In force no later than May 2030 | no later than May 2030 |
| US 10,100,464 | Lapsed on the fee record Oct 2026 | Oct 2026 |
| US 11,377,791 | Lapsed on the fee record Jul 2026 | Jul 2026 |
| US 11,162,219 | Lapsed on the fee record Nov 2025 | Nov 2025 |
| US 11,732,411 | In force May 2030 | May 2030 |
| US 11,970,817 | In force no later than May 2030 | no later than May 2030 |
| Application 18/619,339 | Abandoned not computed | not computed |
8 of 9 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 14, 2011 Reel 25960, frame 850 | Husband, John Claude; Svending, Per; Skuse, David Robert; Motsi, Tafadzwa; Likitalo, Mikko; Coles, Alan | Imerys Minerals, Limited | Assignment of Assignor's Interest |
| Oct 3, 2016 Reel 39921, frame 214 | Imerys Minerals Limited | Fiberleantm Technologies Limited | Assignment of Assignor's Interest |
| Oct 3, 2016 Reel 39921, frame 266 | Fiberleantm Technologies Limited | Fiberlean Technologies Limited | 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
Nov 2030
Term ends Nov 2, 2030. Maintenance fees still fall due before then
Note
The 169 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
56
later US patents cite this one
That is top 10% 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.