Lapsed Aug 2, 2024 on the fee record · High confidence
20-year base term ends Apr 8, 2030
Second maintenance fee unpaid; grace period ended.
Held by Twitter, Inc.
Filed Feb 19, 2013 as application 13/770,979 · Granted Aug 2, 2016
Base term, 20 years from filing, plus 534 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
Lapsed Aug 2, 2024
2010
2031
Clock starts
Apr 8, 2010
Apr 8, 2010
No longer in force
Aug 2, 2024
Aug 2, 2024
Granted
Aug 2, 2016
Aug 2, 2016
Term would have run to
Sep 23, 2031
Sep 23, 2031
base term
patent term adjustment
after the term ends
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
534
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 8,448,084.
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.
27
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 Sep 23, 2031: its 20-year base term plus 534 days of term adjustment for prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 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 Apr 8, 2010, when application 12/756,574, the earliest non-provisional in its chain, was filed (this one was filed Feb 19, 2013) | Apr 8, 2030 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +534 days, USPTO patent term adjustment record | Sep 24, 2031 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,448,084) | capped to Sep 23, 2031 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | lapsed Aug 2, 2024 | High confidence |
| Computed term end | The steps above, in order | Aug 2, 2024 | High confidence |
This family
| US 8,401,009 | Lapsed on the fee record Mar 2025 | Mar 2025 |
| US 8,448,084 | Lapsed on the fee record May 2025 | May 2025 |
| US 10,691,513 | Lapsed on the fee record Jun 2024 | Jun 2024 |
| US 10,133,439 | In force Mar 2033 | Mar 2033 |
| US 9,088,532 | In force Aug 2028 | Aug 2028 |
| US 9,405,453 | this patent Aug 2024 | Aug 2024 |
| US 10,572,102 | Lapsed on the fee record Feb 2024 | Feb 2024 |
| US 9,965,136 | Lapsed on the fee record May 2026 | May 2026 |
8 of 27 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 28, 2022 Reel 62079, frame 677 | Twitter, Inc. | Morgan Stanley Senior Funding, Inc. | Security Interest |
| Mar 27, 2025 Reel 70670, frame 857 | Morgan Stanley Senior Funding, Inc. | X Corp. (F/K/A Twitter, Inc.) | Release of Security Interest |
| Apr 30, 2025 Reel 71127, frame 240 | Morgan Stanley Senior Funding, Inc., as Collateral Agent | X Corp. (F/K/A Twitter, Inc.) | Release of Security Interest |
| Mar 3, 2026 Reel 75015, frame 574 | Morgan Stanley Senior Funding, Inc., as Collateral Agent | X Corp. (F/K/A Twitter, Inc.) | Termination and Release of Security Interest in Patent Rights (REEL 062079, Frame 0677) |
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
Note
The 534 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 8,448,084.
Citations
1
later US patent cites this one
That is below the median of utility patents granted in 2016 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.