Also listed on PSS Systems, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Aug 25, 2027 · High confidence
20-year base term ended Feb 12, 2022
Held by Intellectual Ventures I LLC
Filed Feb 12, 2002 as application 10/074,825 · Granted Jul 23, 2019
Base term plus 2020 days of patent term adjustment (USPTO delay)
Today
2002
2027
Clock starts
Feb 12, 2002
Feb 12, 2002
Term ends
Aug 25, 2027
Aug 25, 2027
Granted
Jul 23, 2019
Jul 23, 2019
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
2,020
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
This patent's term runs 2020 days past its 20-year base term on prosecution delay. 1 of 2 maintenance fees is 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 Feb 12, 2002, when this application, 10/074,825, was filed | Feb 12, 2022 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +2020 days, USPTO patent term adjustment record | Aug 25, 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 | 1 of 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 25, 2027 | 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 12, 2002 Reel 12617, frame 190 | Lee, Chang-ping; Garcla, Denis Jacques Paul; Hildebrand, Hal; Vainstein, Klimenty | Secretseal Incorporated | Assignment of Assignor's Interest |
| Jan 6, 2005 Reel 15530, frame 673 | Pervasive Security Systems, Inc. | PSS Systems, Inc. | Change of Name |
| Jan 6, 2005 Reel 15539, frame 22 | Secretseal Inc. | Pervasive Security Systems, Inc. | Change of Name |
| Feb 12, 2007 Reel 18875, frame 608 | Pervasive Security Systems, Inc. | PSS Systems, Inc. | Change of Name |
| Feb 12, 2007 Reel 18875, frame 612 | PSS Systems, Inc. | Guardian Data Storage, LLC | Assignment of Assignor's Interest |
| Mar 5, 2007 Reel 18958, frame 311 | Secretseal Inc. | Pervasive Security Systems, Inc. | Change of Name |
| Mar 5, 2013 Reel 29929, frame 742 | Guardian Data Storage, LLC | Intellectual Ventures I LLC | Merger |
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
Aug 2027
Term ends Aug 25, 2027. Maintenance fees still fall due before then
Note
The 2020 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
18
later US patents cite this one
That is top 25% of utility patents granted in 2019 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.