Collateral for a security interest recorded Mar 30, 2017 (Perceptive Credit Holdings, LP).
Term ended Jan 28, 2025 · High confidence
20-year base term ended Jan 28, 2025
USPTO later recorded it as expired for non-payment on May 4, 2026.
Held by Singulex, Inc.
Filed Mar 25, 2010 as application 12/731,500 · Granted Apr 1, 2014
Base term, 20 years from filing
Today
Term ended Jan 28, 2025
2005
2026
Clock starts
Jan 28, 2005
Jan 28, 2005
Term ended
Jan 28, 2025
Jan 28, 2025
Granted
Apr 1, 2014
Apr 1, 2014
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.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 7,572,640, to Jan 28, 2025. The term already ends on or before that date, so the cap shortened nothing.
2 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.
12
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 is its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 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 Jan 28, 2005, when application 11/048,660, the earliest non-provisional in its chain, was filed (this one was filed Mar 25, 2010) | Jan 28, 2025 | 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 resolved from the filed document (refs US 7,572,640) | resolves to Jan 28, 2025, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 2 maintenance fees paid | term ended | High confidence |
| USPTO status record | Recorded as expired for non-payment on May 4, 2026, after the term ended | no change | High confidence |
| Computed term end | The steps above, in order | Jan 28, 2025 | High confidence |
This family
| Application 11/048,660 | Abandoned not computed | not computed |
| US 7,572,640 | Term ended Jan 2025 | Jan 2025 |
| US 9,040,305 | In force Oct 2029 | Oct 2029 |
| Application 11/830,762 | Abandoned not computed | not computed |
| Application 11/838,114 | Abandoned not computed | not computed |
| Application 12/276,277 | Abandoned not computed | not computed |
| US 8,685,711 | this patent Jan 2025 | Jan 2025 |
| US 9,063,131 | Term ended Jan 2025 | Jan 2025 |
8 of 12 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 |
|---|---|---|---|
| Nov 12, 2014 Reel 34152, frame 856 | Goix, Philippe J.; Puskas, Robert; Todd, John; Livingston, Richard A.; Held, Douglas | Singulex, Inc. | Assignment of Assignor's Interest |
| Oct 14, 2015 Reel 36795, frame 185 | Singulex, Inc. | Oxford Finance LLC | Security Interest |
| Oct 4, 2016 Reel 40224, frame 70 | Oxford Finance LLC | Singulex, Inc. | Termination and Release of Security Interest in Patents (Releases RF 036795/0185) |
| Mar 30, 2017 Reel 42117, frame 716 | Singulex, Inc. | Perceptive Credit Holdings, LP | Patent Security Agreement |
| May 6, 2019 Reel 49095, frame 371 | Perceptive Credit Holdings, LP | Fisk Ventures, LLC | Assignment of Patent Security Agreement |
| Jun 19, 2019 Reel 49516, frame 444 | Singulex, Inc. | EMD Millipore Corporation | License |
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.
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 7,572,640, ends no earlier than this term, so it caps nothing.
Citations
44
later US patents cite this one
That is top 25% of utility patents granted in 2014 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.