Term ends no later than Oct 21, 2031 · Medium confidence
20-year base term ends Oct 6, 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 Wayne State University
Filed Apr 2, 2010 as application 12/681,516 · Granted Nov 5, 2019
Base term plus 1110 days of patent term adjustment (USPTO delay)
Today
2008
2031
Clock starts
Oct 6, 2008
Oct 6, 2008
Ends no later than
Oct 21, 2031
Oct 21, 2031
Granted
Nov 5, 2019
Nov 5, 2019
base term
patent term adjustment
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
1,110
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
1 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.
5
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 1110 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. 1 of 2 maintenance fees is paid so far. 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 Oct 6, 2008, when application PCT/US2008/078988, the earliest non-provisional in its chain, was filed (this one was filed Apr 2, 2010) | Oct 6, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1110 days, USPTO patent term adjustment record | Oct 21, 2031 | 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 | 1 of 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | no later than Oct 21, 2031 | Medium confidence |
This family
| Application PCT/US2008/078988 | PCT application no patent term | no patent term |
| US 10,463,609 | this patent no later than Oct 2031 | no later than Oct 2031 |
| Application 15/173,369 | Abandoned not computed | not computed |
| Application 15/441,091 | Abandoned not computed | not computed |
| US 11,684,569 | In force Jun 2029 | Jun 2029 |
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 |
|---|---|---|---|
| Jun 10, 2010 Reel 24514, frame 764 | Kannan, Rangaramanujam M; Iezzi, Raymond; Rajaguru, Bharath; Kannan, Sujatha | Wayne State University | Assignment of Assignor's Interest |
| Jul 19, 2019 Reel 49809, frame 125 | Wayne State University | National Science Foundation | Confirmatory License |
| Oct 30, 2024 Reel 69066, frame 586 | Ashvattha Therapeutics, Inc. | Sagent Group, LLC | Security Interest |
| May 29, 2025 Reel 71258, frame 198 | Sagent Group, LLC, as Agent | Ashvattha Therapeutics, Inc. | Release of 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Oct 2031
Term ends no later than Oct 21, 2031. Maintenance fees still 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
Note
The 1110 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Oct 21, 2031. We will not guess the cap.
Citations
62
later US patents cite this one
That is top 5% of utility patents granted in 2019 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.