Collateral for a security interest recorded Oct 23, 2020 (Barings Finance LLC).
Lapsed Oct 24, 2025 on the fee record · Medium confidence
20-year base term ends Aug 4, 2031
Why Medium: A terminal disclaimer is on file (approved) with no resolved reference, so the term may end earlier.
Second maintenance fee unpaid; grace period ended.
Held by RPX Corporation
Filed Aug 4, 2011 as application 13/136,670 · Granted Oct 24, 2017
Base term, 20 years from filing
Today
Lapsed Oct 24, 2025
2011
2031
Clock starts
Aug 4, 2011
Aug 4, 2011
No longer in force
Oct 24, 2025
Oct 24, 2025
Granted
Oct 24, 2017
Oct 24, 2017
Term would have run to
Aug 4, 2031
Aug 4, 2031
base term
after the term ends
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
None
Term adjustment
No prosecution delay on this record.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
1 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.
17
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 Aug 4, 2031: its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. 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 Aug 4, 2011, when this application, 13/136,670, was filed | Aug 4, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | lapsed Oct 24, 2025 | High confidence |
| Computed term end | The steps above, in order | Oct 24, 2025 | Medium confidence |
This family
| Application 13/136,024 | Abandoned not computed | not computed |
| US 8,930,714 | In force Jul 2031 | Jul 2031 |
| US 8,943,313 | Lapsed on the fee record Jan 2023 | Jan 2023 |
| US 9,575,903 | Lapsed on the fee record Feb 2025 | Feb 2025 |
| US 9,798,873 | this patent Oct 2025 | Oct 2025 |
| US 9,443,085 | Lapsed on the fee record Sep 2024 | Sep 2024 |
| US 9,471,373 | Lapsed on the fee record Oct 2024 | Oct 2024 |
| US 8,955,111 | Lapsed on the fee record Feb 2023 | Feb 2023 |
8 of 17 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 |
|---|---|---|---|
| Jun 5, 2013 Reel 30549, frame 983 | Gerrity, Daniel A.; Tegreene, Clarence T. | Elwha LLC | Assignment of Assignor's Interest |
| Dec 15, 2017 Reel 44411, frame 956 | Elwha LLC | The Invention Science Fund II, LLC | Assignment of Assignor's Interest |
| Feb 13, 2018 Reel 44919, frame 318 | The Invention Science Fund II, LLC | RPX Corporation | Assignment of Assignor's Interest |
| Jun 29, 2018 Reel 46486, frame 433 | RPX Corporation | Jefferies Finance LLC | Security Interest |
| Oct 23, 2020 Reel 54244, frame 566 | RPX Clearinghouse LLC; RPX Corporation | Barings Finance LLC, as Collateral Agent | Patent Security Agreement |
| Oct 26, 2020 Reel 54486, frame 422 | Jefferies Finance LLC | RPX Corporation | Release of Security 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
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Oct 24, 2025. We will not guess the cap.
Citations
51
later US patents cite this one
That is top 10% of utility patents granted in 2017 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.