Term ends Feb 24, 2040 · High confidence
20-year base term ends May 24, 2039
Held by Alector LLC
Filed May 24, 2019 as application 16/421,692 · Granted May 3, 2022
Base term plus 276 days of patent term adjustment (USPTO delay)
Today
2019
2040
Clock starts
May 24, 2019
May 24, 2019
Term ends
Feb 24, 2040
Feb 24, 2040
Granted
May 3, 2022
May 3, 2022
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
276
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 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.
4
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 276 days past its 20-year base term on prosecution delay. 1 of 3 maintenance fees is 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 May 24, 2019, when this application, 16/421,692, was filed | May 24, 2039 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +276 days, USPTO patent term adjustment record | Feb 24, 2040 | 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 | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Feb 24, 2040 | High confidence |
This family
| US 11,319,373 | this patent Feb 2040 | Feb 2040 |
| US 11,976,119 | In force May 2039 | May 2039 |
| US 12,258,410 | In force May 2039 | May 2039 |
| Application 19/057,127 | 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 |
|---|---|---|---|
| Aug 22, 2019 Reel 50135, frame 909 | Pincetic, Andrew; Ho, Wei-hsien; Culp, Patricia; Rosenthal, Arnon | Alector LLC | Assignment of Assignor's Interest |
| Nov 14, 2024 Reel 69386, frame 141 | Alector, Inc.; Alector LLC | Hercules Capital, Inc., as Agent | Security Interest |
| Jul 9, 2026 Reel 76367, frame 631 | Hercules Capital, Inc. | Alector LLC; Alector 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
Feb 2040
Term ends Feb 24, 2040. Maintenance fees still fall due before then
Note
The 276 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
16
later US patents cite this one
That is top 10% of utility patents granted in 2022 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.