Lapsed Oct 16, 2026 on the fee record · Low confidence
20-year base term ends May 17, 2030
Second maintenance fee unpaid; grace period ended. The USPTO has not yet posted the lapse.
Held by Fiberlean Technologies Limited
Filed Sep 2, 2015 as application 14/843,516 · Granted Oct 16, 2018
Base term, 20 years from filing
Today
Lapsed Oct 16, 2026
2010
2030
Clock starts
May 17, 2010
May 17, 2010
No longer in force
Oct 16, 2026
Oct 16, 2026
Granted
Oct 16, 2018
Oct 16, 2018
Term would have run to
May 17, 2030
May 17, 2030
base term
after the term ends
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
None
Term adjustment
No prosecution delay on this record.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
1 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.
9
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 May 17, 2030: its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. Confidence: Low. 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 Sep 2, 2015) | 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 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 | No fee event states this; the fee state is read from the payments the fee record holds; the fee record shows no payment for this window, and USPTO's status still reads "Patented Case" | lapsed Oct 16, 2026 | Low confidence |
| Computed term end | The steps above, in order | Oct 16, 2026 | Low 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 | this patent 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 |
|---|---|---|---|
| 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 |
| Oct 18, 2016 Reel 40045, frame 450 | Husband, John Claude; Svending, Per; Skuse, David Robert; Motsi, Tafadzwa; Likitalo, Mikko; Coles, Alan | Imerys Minerals, Ltd. | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Oct 16, 2026. We will not guess the cap.
Citations
14
later US patents cite this one
That is top 25% of utility patents granted in 2018 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.