Term ends May 17, 2030 · Medium confidence
20-year base term ends May 17, 2030
Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 10,100,464), so the cap could be lower.
Held by Fiberlean Technologies Limited
Filed Oct 1, 2021 as application 17/492,036 · Granted Aug 22, 2023
Base term, 20 years from filing
Today
2010
2030
Clock starts
May 17, 2010
May 17, 2010
Term ends
May 17, 2030
May 17, 2030
Granted
Aug 22, 2023
Aug 22, 2023
base term
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 10,100,464, US 9,127,405, to May 17, 2030. The term already ends on or before that date, so the cap shortened nothing.
0 of 1
Maintenance fees paid
One maintenance fee can end this term early, the one due 3.5 years from grant; the next one's grace period runs past the term end. This counts it if the record shows it 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 is 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. 0 of 1 maintenance fees are paid so far. 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 May 17, 2010, when application PCT/GB2010/000982, the earliest non-provisional in its chain, was filed (this one was filed Oct 1, 2021) | May 17, 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 10,100,464, US 9,127,405) | resolves to May 17, 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 1 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | May 17, 2030 | Medium confidence |
This family
| US 9,127,405 | In force 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 | this patent 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 |
|---|---|---|---|
| Dec 15, 2021 Reel 58393, frame 904 | Husband, John Claude; Svending, Per; Skuse, David Robert; Motsi, Tafadzwa | Fiberlean Technologies Limited | Assignment of Assignor's Interest |
| Apr 6, 2023 Reel 63395, frame 641 | Husband, Johnc Claude; Svending, Per; Skuse, David Robert; Motsi, Tafadzwa | Imerys Minerals Limited | Corrective Assignment to Correct the the Assignee's Name Previously Recorded at Reel: 058393 Frame: 0904. Assignor(S) Hereby Confirms the Assignment. |
| Apr 26, 2023 Reel 63447, frame 504 | Imerys Minerals Limited | Fiberleantm Technologies Limited | Assignment of Assignor's Interest |
| Apr 26, 2023 Reel 63460, frame 663 | 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
May 2030
Term ends May 17, 2030. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 10,100,464, US 9,127,405, 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 2023 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.