Term ends Apr 3, 2036 · High confidence
20-year base term ends May 6, 2035
Held by VertiFlex, Inc.
Filed Nov 8, 2019 as application 16/678,801 · Granted Jun 14, 2022
Base term plus 333 days of patent term adjustment (USPTO delay)
Today
2015
2036
Clock starts
May 6, 2015
May 6, 2015
Term ends
Apr 3, 2036
Apr 3, 2036
Granted
Jun 14, 2022
Jun 14, 2022
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
333
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 10,524,772, to Apr 3, 2036. The term already ends on or before that date, so the cap shortened nothing.
1 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.
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 333 days past its 20-year base term on prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 1 of 3 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 May 6, 2015, when application PCT/US2015/029537, the earliest non-provisional in its chain, was filed (this one was filed Nov 8, 2019) | May 6, 2035 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +333 days, USPTO patent term adjustment record | Apr 3, 2036 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,524,772) | resolves to Apr 3, 2036, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Apr 3, 2036 | High confidence |
This family
| Application PCT/US2015/029537 | PCT application no patent term | no patent term |
| US 10,524,772 | In force May 2036 | May 2036 |
| US 11,357,489 | this patent Apr 2036 | Apr 2036 |
| US 12,035,884 | In force Feb 2036 | Feb 2036 |
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
Apr 2036
Term ends Apr 3, 2036. Maintenance fees still fall due before then
Note
The 333 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 10,524,772, 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 2022 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.