Term ends Mar 30, 2031 · Medium confidence
20-year base term ends Sep 7, 2029
Why Medium: A parent in the chain could not be resolved.
Held by Renishaw PLC
Filed Nov 13, 2017 as application 15/810,621 · Granted Jun 22, 2021
Base term plus 569 days of patent term adjustment (USPTO delay)
Today
2009
2031
Clock starts
Sep 7, 2009
Sep 7, 2009
Term ends
Mar 30, 2031
Mar 30, 2031
Granted
Jun 22, 2021
Jun 22, 2021
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
569
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
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.
4
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 569 days past its 20-year base term on prosecution delay. 1 of 2 maintenance fees is 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 Sep 7, 2009, when application PCT/GB2009/002147, the earliest non-provisional in its chain, was filed (this one was filed Nov 13, 2017); a parent in its chain could not be resolved (the next row) | Sep 7, 2029 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +569 days, USPTO patent term adjustment record | Mar 30, 2031 | 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 | 1 of 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 30, 2031 | Medium confidence |
This family
| US 9,114,478 | In force Apr 2032 | Apr 2032 |
| US 9,849,543 | In force Dec 2029 | Dec 2029 |
| US 11,040,414 | this patent Mar 2031 | Mar 2031 |
3 of 4 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
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
Mar 2031
Term ends Mar 30, 2031. Maintenance fees still fall due before then
Note
The 569 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.