Term ends Sep 23, 2040 · Low confidence
20-year base term ends Sep 23, 2040
Held by Element Biosciences, Inc.
Filed Feb 18, 2022 as application 17/675,154 · Granted Mar 4, 2025
Base term, 20 years from filing
Today
2020
2040
Clock starts
Sep 23, 2020
Sep 23, 2020
Term ends
Sep 23, 2040
Sep 23, 2040
Granted
Mar 4, 2025
Mar 4, 2025
base term
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
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 11,287,422, to Sep 23, 2040. The term already ends on or before that date, so the cap shortened nothing.
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.
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 is its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 0 of 3 maintenance fees are paid so far. Confidence: Low. 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 23, 2020, when application PCT/US2020/052305, the earliest non-provisional in its chain, was filed (this one was filed Feb 18, 2022); a parent in its chain could not be resolved (the next row) | Sep 23, 2040 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 11,287,422) | resolves to Sep 23, 2040, no earlier than this term, so no change | Medium 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 | Sep 23, 2040 | Low confidence |
This family
| Application PCT/US2020/052305 | PCT application no patent term | no patent term |
| Application 17/144,945 | Abandoned not computed | not computed |
| US 11,287,422 | In force no later than Sep 2040 | no later than Sep 2040 |
| US 12,241,891 | this patent Sep 2040 | Sep 2040 |
| Application 18/202,247 | Abandoned not computed | not computed |
| Application 18/202,246 | Abandoned not computed | not computed |
| Application 19/041,497 | Pending not computed | not computed |
| Application 19/651,555 | Pending 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 |
|---|---|---|---|
| Mar 9, 2022 Reel 59209, frame 779 | Previte, Michael; He, Molly; Zhao, Junhua; Arslan, Sinan; Kellinger, Matthew; Berti, Lorenzo; Mah, Hui Zhen; Chen, Steve Xiangling; Zhou, Chunhong | Element Biosciences, Inc. | Assignment of Assignor's 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.
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Alerts on its grants, lapses and transfers.
What's changing
Sep 2040
Term ends Sep 23, 2040. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 11,287,422, ends no earlier than this term, so it caps nothing.
Citations
5
later US patents cite this one
Fewer than half of the utility patents granted in 2025 in our data have been cited yet, so we show the count and do not rank on it.
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.