Collateral for a security interest recorded Aug 6, 2024 (Barings Finance LLC).
Term ends Nov 23, 2026 · High confidence
20-year base term ended Mar 31, 2025
Held by RPX Corporation
Filed Mar 31, 2005 as application 11/094,439 · Granted May 12, 2009
Base term plus 602 days of patent term adjustment (USPTO delay)
Today
2005
2026
Clock starts
Mar 31, 2005
Mar 31, 2005
Term ends
Nov 23, 2026
Nov 23, 2026
Granted
May 12, 2009
May 12, 2009
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
602
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 602 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 Mar 31, 2005, when this application, 11/094,439, was filed | Mar 31, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +602 days, USPTO patent term adjustment record | Nov 23, 2026 | 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 | Nov 23, 2026 | 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 |
|---|---|---|---|
| Mar 31, 2005 Reel 16452, frame 254 | Dominique, Francis; Hsuan, Yi | Lucent Technologies Inc. | Assignment of Assignor's Interest |
| Mar 18, 2009 Reel 22411, frame 945 | Lucent Technologies Inc. | Alcatel-Lucent USA Inc. | Merger |
| Mar 7, 2013 Reel 30510, frame 627 | Alcatel-Lucent USA Inc. | Credit Suisse AG | Security Interest |
| Oct 9, 2014 Reel 33950, frame 1 | Credit Suisse AG | Alcatel-Lucent USA Inc. | Release of Security Interest |
| Sep 13, 2017 Reel 43877, frame 1 | Nokia Technologies Oy; Nokia Solutions and Networks B.V.; Alcatel Lucent SAS | Provenance Asset Group LLC | Assignment of Assignor's Interest |
| Sep 13, 2017 Reel 43879, frame 1 | Provenance Asset Group Holdings, LLC; Provenance Asset Group LLC | Nokia USA Inc. | Security Interest |
| Sep 13, 2017 Reel 43967, frame 1 | Provenance Asset Group Holdings, LLC; Provenance Asset Group, LLC | Cortland Capital Market Services, LLC | Security Interest |
| Feb 14, 2019 Reel 48370, frame 682 | Nokia USA Inc. | Nokia US Holdings Inc. | Assignment and Assumption Agreement |
| Nov 30, 2021 Reel 58363, frame 723 | Nokia US Holdings Inc. | Provenance Asset Group Holdings LLC; Provenance Asset Group LLC | Release of Security Interest |
| Nov 30, 2021 Reel 58983, frame 104 | Cortland Capital Markets Services LLC | Provenance Asset Group Holdings LLC; Provenance Asset Group LLC | Release of Security Interest |
| Nov 30, 2021 reel/frame not recorded | Cortland Capital Markets Services LLC | Provenance Asset Group Holdings LLC | Release of Security Interest |
| Nov 30, 2021 reel/frame not recorded | Cortland Capital Markets Services LLC | Provenance Asset Group LLC | Release of Security Interest |
| Nov 30, 2021 reel/frame not recorded | Nokia US Holdings Inc. | Provenance Asset Group Holdings LLC | Release of Security Interest |
| Nov 30, 2021 reel/frame not recorded | Nokia US Holdings Inc. | Provenance Asset Group LLC | Release of Security Interest |
| Dec 28, 2021 Reel 59352, frame 1 | Provenance Asset Group LLC | RPX Corporation | Assignment of Assignor's Interest |
| Apr 22, 2023 Reel 63429, frame 1 | RPX Corporation | Barings Finance LLC, as Collateral Agent | Patent Security Agreement |
| Aug 5, 2024 Reel 68328, frame 278 | Barings Finance LLC | RPX Corporation | Release of Lien on Patents |
| Aug 6, 2024 Reel 68328, frame 674 | RPX Corporation; RPX Clearinghouse LLC | Barings Finance LLC, as Collateral Agent | Patent Security Agreement |
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
Nov 2026
Term ends Nov 23, 2026. No further fees fall due before then
Note
The 602 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
5
later US patents cite this one
That is below the median of utility patents granted in 2009 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.