Collateral for a security interest recorded Mar 30, 2017 (Perceptive Credit Holdings, LP).
Term ends Dec 18, 2028 · High confidence
20-year base term ends Dec 18, 2028
Held by Singulex, Inc.
Filed Feb 22, 2011 as application 13/031,784 · Granted Sep 11, 2012
Base term, 20 years from filing
Today
2008
2028
Clock starts
Dec 18, 2008
Dec 18, 2008
Term ends
Dec 18, 2028
Dec 18, 2028
Granted
Sep 11, 2012
Sep 11, 2012
base term
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 7,914,734, to Dec 18, 2028. The term already ends on or before that date, so the cap shortened nothing.
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.
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. 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 Dec 18, 2008, when application 12/338,955, the earliest non-provisional in its chain, was filed (this one was filed Feb 22, 2011) | Dec 18, 2028 | 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 7,914,734) | resolves to Dec 18, 2028, no earlier than this term, so no change | 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 | Dec 18, 2028 | High confidence |
This family
| US 7,914,734 | In force Nov 2029 | Nov 2029 |
| US 8,264,684 | this patent Dec 2028 | Dec 2028 |
| US 8,462,339 | In force no later than Dec 2028 | no later than Dec 2028 |
| US 8,634,075 | In force Dec 2028 | Dec 2028 |
| US 8,917,392 | In force Dec 2028 | Dec 2028 |
| US 9,239,284 | In force Dec 2028 | Dec 2028 |
| US 10,107,752 | In force Dec 2028 | Dec 2028 |
| Application 16/159,345 | Abandoned not computed | not computed |
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 |
|---|---|---|---|
| Feb 22, 2011 Reel 25844, frame 468 | Livingston, Richard A. | 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.
What's changing
Dec 2028
Term ends Dec 18, 2028. No further fees fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 7,914,734, ends no earlier than this term, so it caps nothing.
Citations
10
later US patents cite this one
That is above the median of utility patents granted in 2012 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.