Term ends no later than May 8, 2028 · Medium confidence
20-year base term ends May 8, 2028
In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.
Held by Biothera, Inc.
Filed Apr 24, 2013 as application 13/869,531 · Granted Oct 14, 2014
Base term, 20 years from filing
Today
2008
2028
Clock starts
May 8, 2008
May 8, 2008
Ends no later than
May 8, 2028
May 8, 2028
Granted
Oct 14, 2014
Oct 14, 2014
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.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
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.
3
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 on file with no resolved reference, so no cap is applied and none is guessed. All three maintenance fees are recorded paid; no more fees are due. 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 May 8, 2008, when application 12/151,666, the earliest non-provisional in its chain, was filed (this one was filed Apr 24, 2013) | May 8, 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 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | no later than May 8, 2028 | Medium confidence |
This family
| US 7,981,447 | In force Oct 2028 | Oct 2028 |
| US 8,530,642 | In force May 2028 | May 2028 |
| US 8,859,759 | this patent no later than May 2028 | no later than May 2028 |
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 |
|---|---|---|---|
| Apr 8, 2015 Reel 35361, frame 929 | Biothera, Inc.; Life Source Basics Inc.; Biothera Health Inc. | Midcap Financial Trust, As Agent | Security Interest |
| Aug 19, 2020 Reel 53544, frame 419 | Biothera, Inc. | Hibercell, Inc. | Assignment of Assignor's Interest |
| Jul 13, 2021 Reel 56838, frame 328 | Midcap Financial Services, LLC | Biothera, Inc.; Life Source Basics Inc.; Biothera Health Inc. | Release of Security Interest |
| Jul 13, 2021 reel/frame not recorded | Midcap Financial Services, LLC | Biothera, Inc. | Release of Security Interest |
| Jul 13, 2021 reel/frame not recorded | Midcap Financial Services, LLC | Life Source Basics Inc. | Release of Security Interest |
| Jul 13, 2021 reel/frame not recorded | Midcap Financial Services, LLC | Biothera Health Inc. | Release of Security Interest |
| Jul 14, 2021 Reel 56847, frame 273 | Cox, Donald J. | Biopolymer Engineering, Inc. Dba Biothera, Inc. | Assignment of Assignor's Interest |
| Jul 14, 2021 Reel 56876, frame 408 | Biopolymer Engineering, Inc. Dba Biothera, Inc. | Biothera, Inc. | Change of Name |
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
May 2028
Term ends no later than May 8, 2028. No further fees fall due before then
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 May 8, 2028. We will not guess the cap.
Citations
1
later US patent cites this one
That is below the median 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
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. 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.