Term ended Mar 14, 2026 · High confidence
20-year base term ended Jun 1, 2025
Filed Jun 1, 2005 as application 11/141,958 · Granted Jun 9, 2009
Base term plus 286 days of patent term adjustment (USPTO delay)
Today
Term ended Mar 14, 2026
2005
2026
Clock starts
Jun 1, 2005
Jun 1, 2005
Term ended
Mar 14, 2026
Mar 14, 2026
Granted
Jun 9, 2009
Jun 9, 2009
base term
patent term adjustment
after the term ends
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
286
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.
14
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 286 days past its 20-year base term on prosecution delay. All three maintenance fees were paid, so no fee lapse ended it. 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 Jun 1, 2005, when this application, 11/141,958, was filed | Jun 1, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +286 days, USPTO patent term adjustment record | Mar 14, 2026 | 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 | term ended | High confidence |
| Computed term end | The steps above, in order | Mar 14, 2026 | High confidence |
This family
| US 7,075,535 | Lapsed on the fee record Jul 2018 | Jul 2018 |
| US 7,133,054 | Lapsed on the fee record Nov 2018 | Nov 2018 |
| US 7,042,455 | Term ended Jun 2024 | Jun 2024 |
| US 7,254,271 | Term ended Jun 2024 | Jun 2024 |
| US 7,224,361 | Lapsed on the fee record May 2019 | May 2019 |
| US 7,546,419 | this patent Mar 2026 | Mar 2026 |
| US 7,912,299 | Lapsed on the fee record Mar 2023 | Mar 2023 |
| US 7,930,434 | In force Dec 2026 | Dec 2026 |
8 of 14 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 |
|---|---|---|---|
| Jul 21, 2005 Reel 16796, frame 835 | Y Arcas, Blaise Aguera | Sand Codex, LLC | Assignment of Assignor's Interest |
| Jul 12, 2006 Reel 17921, frame 1 | Sand Codex, LLC | Seadragon Software, Inc. | Merger |
| Nov 1, 2007 Reel 20052, frame 368 | Seadragon Software, Inc. | Microsoft Corporation | Merger |
| Dec 9, 2014 Reel 34543, frame 1 | Microsoft Corporation | Microsoft Technology Licensing, LLC | 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
Note
The 286 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
8
later US patents cite this one
That is below the median of utility patents granted in 2009 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.