Term ends Sep 24, 2033 · High confidence
20-year base term ends May 2, 2029
Held by Kyndryl, Inc.
Filed May 2, 2009 as application 12/434,621 · Granted Nov 13, 2018
Base term plus 1606 days of patent term adjustment (USPTO delay)
Today
2009
2033
Clock starts
May 2, 2009
May 2, 2009
Term ends
Sep 24, 2033
Sep 24, 2033
Granted
Nov 13, 2018
Nov 13, 2018
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
1,606
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 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.
3
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 1606 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. 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 2, 2009, when this application, 12/434,621, was filed | May 2, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1606 days, USPTO patent term adjustment record | Sep 24, 2033 | 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Sep 24, 2033 | High confidence |
This family
| US 10,127,059 | this patent Sep 2033 | Sep 2033 |
| US 9,870,238 | In force Oct 2030 | Oct 2030 |
| US 10,817,318 | In force May 2029 | May 2029 |
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 |
|---|---|---|---|
| Aug 18, 2009 Reel 23111, frame 376 | Astete, Nicholas Luis; Brethorst, Aaron Benjamin; Goldberg, Joseph Michael; Hanlon, Matthew; Hutchinson, Anthony A., JR.; Janakiraman, Gopalakrishnan; Kotelnikov, Alexander; Novodvorskiy, Petr; Richardson, David William; Skelly, Roxanne Camille; Slioussar, Nikolai; Weeks, Jonathan | Skytap | Assignment of Assignor's Interest |
| May 11, 2020 Reel 52628, frame 264 | Skytap, Inc. | Silicon Valley Bank | Security Interest |
| Dec 16, 2022 Reel 62128, frame 545 | Skytap, Inc. | Vistara Technology Growth Fund (Canada) IV LP | Security Interest |
| Aug 23, 2023 Reel 64671, frame 54 | Skytap, Inc. | First-Citizens Bank & Trust Company | Security Interest |
| May 6, 2024 Reel 67329, frame 154 | Vistara Technology Growth Fund (Canada) IV LP | Skytap, Inc. | Termination and Release of Intellectual Property Security Agreement Recorded at Reel 062128 Frame 0545 |
| May 6, 2024 Reel 67329, frame 274 | Silicon Valley Bank | Skytap, Inc. | Termination and Release of Intellectual Property Security Agreement |
| May 6, 2024 Reel 67329, frame 295 | First-Citizens Bank & Trust Company | Skytap, Inc. | Termination and Release of Intellectual Property Security Agreement |
| Mar 18, 2025 Reel 70545, frame 889 | Skytap, Inc. | 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
Sep 2033
Term ends Sep 24, 2033. Maintenance fees still fall due before then
Note
The 1606 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
641
later US patents cite this one
That is top 1% of utility patents granted in 2018 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.