Also listed on Internet Security Systems, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends May 12, 2027 · Medium confidence
20-year base term ended Oct 10, 2020
Why Medium: A parent in the chain could not be resolved.
Held by Kyndryl, Inc.
Filed Jul 13, 2007 as application 11/777,489 · Granted May 5, 2015
Base term plus 2405 days of patent term adjustment (USPTO delay)
Today
2000
2027
Clock starts
Oct 10, 2000
Oct 10, 2000
Term ends
May 12, 2027
May 12, 2027
Granted
May 5, 2015
May 5, 2015
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
2,405
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.
2
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 2405 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. 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 Oct 10, 2000, when application 09/685,285, the earliest non-provisional in its chain, was filed (this one was filed Jul 13, 2007); a parent in its chain could not be resolved (the next row) | Oct 10, 2020 | 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 | +2405 days, USPTO patent term adjustment record | May 12, 2027 | 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 | May 12, 2027 | Medium confidence |
This family
| US 9,027,121 | this patent May 2027 | May 2027 |
1 of 2 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 |
|---|---|---|---|
| Oct 4, 2007 Reel 19920, frame 128 | Internet Security Systems, Inc. | International Business Machines Corporation | Assignment of Assignor's Interest |
| Sep 6, 2017 Reel 43509, frame 543 | Hammer, John M.; Ge, Rixin; Burke, Charles D.; Hubbard, Charles | Internet Security Systems, Inc. | 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
May 2027
Term ends May 12, 2027.
Note
The 2405 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
66
later US patents cite this one
That is top 10% 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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.