Also listed on Biocept, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Collateral for a security interest recorded Sep 16, 2026 (3I, LP).
Term ends Sep 22, 2031 · High confidence
20-year base term ends Sep 22, 2031
Held by Cerenome, Inc.
Filed Sep 22, 2011 as application 13/241,083 · Granted May 24, 2016
Base term, 20 years from filing
Today
2011
2031
Clock starts
Sep 22, 2011
Sep 22, 2011
Term ends
Sep 22, 2031
Sep 22, 2031
Granted
May 24, 2016
May 24, 2016
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.
None
Terminal disclaimer
No disclaimer on this record.
2 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 is its 20-year base term, with no adjustment for prosecution delay. 2 of 3 maintenance fees are paid so far. 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 Sep 22, 2011, when this application, 13/241,083, was filed | Sep 22, 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 | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Sep 22, 2031 | 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 |
|---|---|---|---|
| Dec 6, 2011 Reel 27342, frame 925 | Mikolajczyk, Stephen D.; Millar, Lisa S. | Biocept, Inc. | Assignment of Assignor's Interest |
| May 14, 2024 Reel 67409, frame 214 | Biocept, Inc. | Plus Therapeutics, Inc. | Assignment of Assignor's Interest |
| Aug 30, 2026 Reel 76288, frame 260 | Plus Therapeutics, Inc. | Cerenome, Inc. | Change of Name |
| Sep 16, 2026 Reel 76505, frame 1 | Cerenome, Inc.; Cnside Diagnostics, LLC | 3I, LP | 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.
What's changing
Sep 2031
Term ends Sep 22, 2031. Maintenance fees still fall due before then
Citations
3
later US patents cite this one
That is below the median of utility patents granted in 2016 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.