Term ends Nov 3, 2029 · Medium confidence
20-year base term ends Oct 1, 2029
Why Medium: A parent in the chain could not be resolved.
Held by Twilio Inc.
Filed Mar 31, 2021 as application 17/301,323 · Granted Apr 18, 2023
Base term plus 33 days of patent term adjustment (USPTO delay)
Today
2009
2029
Clock starts
Oct 1, 2009
Oct 1, 2009
Term ends
Nov 3, 2029
Nov 3, 2029
Granted
Apr 18, 2023
Apr 18, 2023
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
33
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 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.
12
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 33 days past its 20-year base term on prosecution delay. 1 of 1 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 Oct 1, 2009, when application 12/572,258, the earliest non-provisional in its chain, was filed (this one was filed Mar 31, 2021); a parent in its chain could not be resolved (the next row) | Oct 1, 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 | +33 days, USPTO patent term adjustment record | Nov 3, 2029 | 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 | Nov 3, 2029 | Medium confidence |
This family
| US 8,964,726 | In force Nov 2030 | Nov 2030 |
| US 9,407,597 | In force Oct 2029 | Oct 2029 |
| US 9,807,244 | In force Oct 2029 | Oct 2029 |
| US 10,187,530 | In force Oct 2029 | Oct 2029 |
| US 10,455,094 | In force Oct 2029 | Oct 2029 |
| US 11,005,998 | In force Oct 2029 | Oct 2029 |
| US 11,632,471 | this patent Nov 2029 | Nov 2029 |
| US 11,665,285 | In force Dec 2029 | Dec 2029 |
8 of 12 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 |
|---|---|---|---|
| Mar 31, 2021 Reel 55785, frame 860 | Lawson, Jeffrey; Wolthuis, John; Cooke, Evan | Twilio Inc. | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Nov 2029
Term ends Nov 3, 2029. No further fees fall due before then
Note
The 33 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
5
later US patents cite this one
That is top 25% 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.