Term ends Mar 6, 2029 · High confidence
20-year base term ends Mar 6, 2029
Held by Leverage Design Ltd.
Filed Nov 20, 2018 as application 16/197,058 · Granted Jun 15, 2021
Base term, 20 years from filing
Today
2009
2029
Clock starts
Mar 6, 2009
Mar 6, 2009
Term ends
Mar 6, 2029
Mar 6, 2029
Granted
Jun 15, 2021
Jun 15, 2021
base term
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.
None
Terminal disclaimer
No disclaimer on this record.
1 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. 1 of 1 maintenance fees is 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 Mar 6, 2009, when application 12/399,893, the earliest non-provisional in its chain, was filed (this one was filed Nov 20, 2018) | Mar 6, 2029 | 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 | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 1 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 6, 2029 | High confidence |
This family
| US 8,186,693 | In force Mar 2030 | Mar 2030 |
| US 8,371,590 | In force Mar 2029 | Mar 2029 |
| US 8,695,993 | In force Mar 2029 | Mar 2029 |
| US 9,339,720 | In force May 2029 | May 2029 |
| US 10,137,356 | In force Sep 2029 | Sep 2029 |
| US 11,033,799 | this patent Mar 2029 | Mar 2029 |
| US 11,565,169 | In force Mar 2029 | Mar 2029 |
| US 12,257,492 | In force Mar 2029 | Mar 2029 |
8 of 9 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 2029
Term ends Mar 6, 2029. No further fees fall due before then
Citations
30
later US patents cite this one
That is top 5% 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.