Also listed on Platform Computing Partnership, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Aug 19, 2028 · High confidence
20-year base term ended May 19, 2026
Held by Twitter, Inc.
Filed May 19, 2006 as application 11/437,902 · Granted Jul 6, 2010
Base term plus 823 days of patent term adjustment (USPTO delay)
Today
2006
2028
Clock starts
May 19, 2006
May 19, 2006
Term ends
Aug 19, 2028
Aug 19, 2028
Granted
Jul 6, 2010
Jul 6, 2010
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
823
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 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.
This patent's term runs 823 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 19, 2006, when this application, 11/437,902, was filed | May 19, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +823 days, USPTO patent term adjustment record | Aug 19, 2028 | 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 19, 2028 | High confidence |
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 |
|---|---|---|---|
| May 1, 2007 Reel 19234, frame 851 | Ry, Hans Westgaard; Persvold, Steffen; Bugge, Hakon | Scali As | Assignment of Assignor's Interest |
| Jan 29, 2009 Reel 22176, frame 187 | Scali As | Platform Computing Corporation | Assignment of Assignor's Interest |
| Jul 31, 2012 Reel 28683, frame 434 | Platform Computing Corporation | Platform Computing Partnership | Assignment of Assignor's Interest |
| Aug 2, 2012 Reel 28724, frame 648 | Platform Computing Corporation | Platform Computing Partnership | Assignment of Assignor's Interest |
| Aug 17, 2012 Reel 28808, frame 347 | Platform Computing Partnership | IBM International Group B.V. | Assignment of Assignor's Interest |
| Aug 30, 2012 Reel 28864, frame 933 | IBM International Group B. V. | International Business Machines Corporation | Assignment of Assignor's Interest |
| Jan 16, 2014 Reel 32075, frame 404 | International Business Machines Corporation | Twitter, Inc. | Assignment of Assignor's Interest |
| 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
Aug 2028
Term ends Aug 19, 2028. No further fees fall due before then
Note
The 823 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
3
later US patents cite this one
That is below the median of utility patents granted in 2010 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.