Lapsed Sep 15, 2019 on the fee record · High confidence
20-year base term ends Sep 28, 2029
First maintenance fee unpaid; grace period ended.
Held by Kyndryl, Inc.
Filed Sep 28, 2009 as application 12/568,455 · Granted Sep 15, 2015
Base term, 20 years from filing, plus 1469 days of patent term adjustment (USPTO delay)
Today
Lapsed Sep 15, 2019
2009
2033
Clock starts
Sep 28, 2009
Sep 28, 2009
No longer in force
Sep 15, 2019
Sep 15, 2019
Granted
Sep 15, 2015
Sep 15, 2015
Term would have run to
Oct 6, 2033
Oct 6, 2033
base term
patent term adjustment
after the term ends
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
1,469
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
0 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.
2
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 Oct 6, 2033: its 20-year base term plus 1469 days of term adjustment for prosecution delay. 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 Sep 28, 2009, when this application, 12/568,455, was filed | Sep 28, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1469 days, USPTO patent term adjustment record | Oct 6, 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 | 0 of 3 maintenance fees paid | lapsed Sep 15, 2019 | High confidence |
| Computed term end | The steps above, in order | Sep 15, 2019 | High confidence |
This family
| US 9,135,133 | this patent Sep 2019 | Sep 2019 |
| US 9,602,601 | In force Oct 2029 | Oct 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 |
|---|---|---|---|
| Oct 23, 2009 Reel 23414, frame 121 | McAloon, Daniel; Reese, Joshua Logan | Softlayer Technologies, Inc. | Assignment of Assignor's Interest |
| Aug 16, 2010 Reel 24842, frame 928 | Softlayer Technologies, Inc. | Deutsche Bank AG Cayman Islands Branch, as Collateral Agent | Security Interest |
| Nov 9, 2010 Reel 25832, frame 482 | Softlayer Technologies, Inc. | Suntrust Bank, As Collateral Agent | Security Agreement |
| Nov 12, 2010 Reel 25355, frame 166 | Deutsche Bank AG Cayman Islands Branch, as Collateral Agent | Softlayer Technologies, Inc. | Release of Security Interest |
| Jul 8, 2013 Reel 30763, frame 666 | Suntrust Bank | Softlayer Technologies, Inc. | Release of Security Interest |
| Jul 5, 2021 Reel 56754, frame 340 | Software Technologies, Inc. | International Business Machines Corporation | Assignment of Assignor's Interest |
| Jul 22, 2021 Reel 56963, frame 528 | Softlayer Technologies, Inc. | International Business Machines Corporation | Corrective Assignment to Correct the Conveying Party's Name Previously Recorded at Reel: 056754 Frame: 0340. Assignor(S) Hereby Confirms the Assignment . |
| 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 1469 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
28
later US patents cite this one
That is top 25% of utility patents granted in 2015 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.