Collateral for a security interest recorded Mar 30, 2017 (Perceptive Credit Holdings, LP).
Term ends Nov 17, 2029 · High confidence
20-year base term ends Dec 18, 2028
Held by Singulex, Inc.
Filed Dec 18, 2008 as application 12/338,955 · Granted Mar 29, 2011
Base term plus 334 days of patent term adjustment (USPTO delay)
Today
2008
2029
Clock starts
Dec 18, 2008
Dec 18, 2008
Term ends
Nov 17, 2029
Nov 17, 2029
Granted
Mar 29, 2011
Mar 29, 2011
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
334
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.
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 runs 334 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 Dec 18, 2008, when this application, 12/338,955, was filed | Dec 18, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +334 days, USPTO patent term adjustment record | Nov 17, 2029 | 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 17, 2029 | High confidence |
This family
| US 7,914,734 | this patent Nov 2029 | Nov 2029 |
| US 8,264,684 | In force 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 |
|---|---|---|---|
| Jan 6, 2009 Reel 22065, frame 668 | Livingston, Richard A. | Singulex, Inc. | Assignment of Assignor's Interest |
| Feb 2, 2009 Reel 22216, frame 291 | Livingston, Richard A. | Singulex, Inc. | Re-Record to Correct the Correspondence Address, Previously Recorded on Reel 022065 Frame 0668. |
| 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
Nov 2029
Term ends Nov 17, 2029. No further fees fall due before then
Note
The 334 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
100
later US patents cite this one
That is top 10% of utility patents granted in 2011 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.