Term ended Nov 27, 2025 · Medium confidence
20-year base term ended Dec 14, 2024
Why Medium: A parent in the chain could not be resolved.
Held by Kyndryl, Inc.
Filed Oct 31, 2005 as application 11/263,498 · Granted Apr 21, 2009
Base term plus 348 days of patent term adjustment (USPTO delay)
Today
Term ended Nov 27, 2025
2004
2026
Clock starts
Dec 14, 2004
Dec 14, 2004
Term ended
Nov 27, 2025
Nov 27, 2025
Granted
Apr 21, 2009
Apr 21, 2009
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
348
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.
11
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 348 days past its 20-year base term on prosecution delay. All three maintenance fees were paid, so no fee lapse ended it. 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 Dec 14, 2004, when application 11/011,449, the earliest non-provisional in its chain, was filed (this one was filed Oct 31, 2005); a parent in its chain could not be resolved (the next row) | Dec 14, 2024 | 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 | +348 days, USPTO patent term adjustment record | Nov 27, 2025 | 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 | Nov 27, 2025 | Medium confidence |
This family
| US 8,645,513 | Lapsed on the fee record Feb 2026 | Feb 2026 |
| US 7,568,022 | Lapsed on the fee record Jul 2021 | Jul 2021 |
| US 8,028,334 | Lapsed on the fee record Sep 2015 | Sep 2015 |
| US 7,797,739 | Lapsed on the fee record Sep 2014 | Sep 2014 |
| US 11,477,093 | In force Oct 2032 | Oct 2032 |
| US 7,523,092 | this patent Nov 2025 | Nov 2025 |
| US 8,626,887 | Lapsed on the fee record Jan 2018 | Jan 2018 |
| US 7,937,462 | Lapsed on the fee record May 2015 | May 2015 |
8 of 11 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 |
|---|---|---|---|
| Jan 13, 2006 Reel 17184, frame 350 | Andreev, Dmitry; Greenstein, Paul G.; Grunin, Galina; Vilshansky, Gregory | International Business Machines Corporation | Assignment of Assignor's Interest |
| Oct 13, 2021 Reel 57885, frame 644 | International Business Machines Corporation | Kyndryl, 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
Note
The 348 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
67
later US patents cite this one
That is top 25% 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.