Also listed on Librato, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Jan 17, 2028 · High confidence
20-year base term ends Nov 22, 2026
Filed Nov 22, 2006 as application 11/562,587 · Granted Feb 9, 2010
Base term plus 421 days of patent term adjustment (USPTO delay)
Today
2006
2028
Clock starts
Nov 22, 2006
Nov 22, 2006
Term ends
Jan 17, 2028
Jan 17, 2028
Granted
Feb 9, 2010
Feb 9, 2010
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
421
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.
This patent's term runs 421 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 Nov 22, 2006, when this application, 11/562,587, was filed | Nov 22, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +421 days, USPTO patent term adjustment record | Jan 17, 2028 | 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 | In force | High confidence |
| Computed term end | The steps above, in order | Jan 17, 2028 | High confidence |
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 |
|---|---|---|---|
| Feb 26, 2007 Reel 18932, frame 744 | Ruscio, Joseph F; Heffner, Michael | Evergrid, Inc. | Assignment of Assignor's Interest |
| Jul 29, 2008 Reel 21308, frame 437 | Evergrid, Inc. | Triplepoint Capital LLC | Security Agreement |
| Nov 18, 2009 Reel 23538, frame 248 | California Digital Corporation; Evergrid, Inc. | Librato, Inc. | Change of Name |
| Jul 22, 2010 Reel 24726, frame 876 | California Digital Corporation | Evergrid, Inc. | Corrective Assignment to Correct the Re-Recording to Remove Incorrect Applications. Please Remove 12/420,015; 7,536,591 and PCT US04/38853 from Property List. Previously Recorded on Reel 023538 Frame 0248. Assignor(S) Hereby Confirms the Change of Name Should Be - Assignor: California Digital Corporation; Assignee: Evergrid, Inc.. |
| Aug 12, 2010 Reel 24831, frame 872 | Evergrid, Inc. | Librato, Inc. | Change of Name |
| Jul 30, 2012 Reel 28677, frame 154 | Librato, Inc. | Open Invention Network, LLC | Assignment of Assignor's Interest |
| Aug 29, 2012 Reel 28884, frame 584 | Triplepoint Capital LLC | Librato, Inc. | Release of Collateral Under Security Agreement |
| Dec 9, 2021 Reel 58426, frame 791 | Open Invention Network LLC | International Business Machines Corporation | Assignment of Assignor's Interest |
| Jan 14, 2022 Reel 58736, frame 436 | Open Invention Network LLC | International Business Machines Corporation | Corrective Assignment to Correct the Effective Date of the Patent Assignment Agreement Dated November 30, 2021 Previously Recorded at Reel: 058426 Frame: 0791. Assignor(S) Hereby Confirms the Assignment. |
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
Jan 2028
Term ends Jan 17, 2028. No further fees fall due before then
Note
The 421 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
7
later US patents cite this one
That is below the median of utility patents granted in 2010 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.