Term ends Aug 14, 2042 · High confidence
20-year base term ends Sep 20, 2039
Held by Phasebio Pharmaceuticals, Inc.
Filed Mar 19, 2021 as application 17/278,075 · Granted May 5, 2026
Base term plus 1059 days of patent term adjustment (USPTO delay)
Today
2019
2042
Clock starts
Sep 20, 2019
Sep 20, 2019
Term ends
Aug 14, 2042
Aug 14, 2042
Granted
May 5, 2026
May 5, 2026
base term
patent term adjustment
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
1,059
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
0 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 runs 1059 days past its 20-year base term on prosecution delay. 0 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 20, 2019, when application PCT/US2019/052173, the earliest non-provisional in its chain, was filed (this one was filed Mar 19, 2021) | Sep 20, 2039 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1059 days, USPTO patent term adjustment record | Aug 14, 2042 | 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 | 0 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 14, 2042 | High confidence |
This family
| Application PCT/US2019/052173 | PCT application no patent term | no patent term |
| US 12,617,870 | this patent Aug 2042 | Aug 2042 |
| Application 19/636,775 | Pending not computed | not computed |
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 1, 2021 Reel 56405, frame 575 | Phasebio Pharmaceuticals, Inc. | Silicon Valley Bank | Security Interest |
| Aug 10, 2021 Reel 57130, frame 283 | Lee, John; Ballance, David James | Phasebio Pharmaceuticals, Inc. | Assignment of Assignor's Interest |
| Oct 4, 2022 Reel 61606, frame 35 | Silicon Valley Bank | JMB Capital Partners Lending, LLC | Assignment of Intellectual Property Security Agreement |
| Oct 31, 2022 Reel 61601, frame 1 | Phasebio Pharmaceuticals, Inc. | JMB Capital Partners Lending, LLC | Security Interest |
| Jan 13, 2023 Reel 62376, frame 850 | JMB Capital Partners Lending, LLC | Phasebio Pharmaceuticals, 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
Aug 2042
Term ends Aug 14, 2042. Maintenance fees still fall due before then
Note
The 1059 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
We have no citation count for this patent yet. That is not the same as never having been cited.
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.