Collateral for a security interest recorded Jan 28, 2019 (Midcap Financial Trust).
Term ends Oct 4, 2032 · Low confidence
20-year base term ends Oct 4, 2032
Held by Sight Sciences, Inc.
Filed Dec 26, 2017 as application 15/854,126 · Granted Jan 12, 2021
Base term plus 129 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2012
2032
Clock starts
Oct 4, 2012
Oct 4, 2012
Term ends
Oct 4, 2032
Oct 4, 2032
Granted
Jan 12, 2021
Jan 12, 2021
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
129
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 10,179,066, US 8,894,603, US 9,095,412, US 9,216,109, US 9,855,167, US 9,895,258.
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.
8
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 129 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 1 of 2 maintenance fees is 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 Oct 4, 2012, when application 13/644,769, the earliest non-provisional in its chain, was filed (this one was filed Dec 26, 2017); a parent in its chain could not be resolved (the next row) | Oct 4, 2032 | 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 | +129 days, USPTO patent term adjustment record | Feb 10, 2033 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,179,066, US 8,894,603, US 9,095,412, US 9,216,109, US 9,855,167, US 9,895,258) | capped to Oct 4, 2032 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 2 maintenance fees paid | In force | High confidence |
| Further caveats on record | The record names parents not resolved: 13644769 | Low confidence overall | Low confidence |
| Computed term end | The steps above, in order | Oct 4, 2032 | Low confidence |
This family
| US 9,855,167 | In force Jun 2035 | Jun 2035 |
| US 10,888,453 | this patent Oct 2032 | Oct 2032 |
| Application 17/121,455 | Abandoned not computed | not computed |
| US 11,344,447 | In force Oct 2032 | Oct 2032 |
| US 11,471,324 | In force Oct 2032 | Oct 2032 |
| US 11,951,037 | In force Oct 2032 | Oct 2032 |
| US 12,127,974 | In force Oct 2032 | Oct 2032 |
| Application 18/892,271 | 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 14, 2018 Reel 46091, frame 22 | Badawi, David Y.; O'keeffe, Daniel; Badawi, Paul | Sight Sciences, Inc. | Assignment of Assignor's Interest |
| Jan 28, 2019 Reel 48149, frame 209 | Sight Sciences, Inc. | Midcap Financial Trust, As Agent | Security Agreement (TERM Loan) |
| Jan 28, 2019 Reel 49670, frame 542 | Sight Sciences, Inc. | Midcap Financial Trust, As Agent | Security Agreement (Revolving Loan) |
| Nov 25, 2020 Reel 54524, frame 8 | Sight Sciences, Inc. | Midcap Funding IV Trust, as Agent | Reaffirmed and Amended Security Interest (REVOLVING) |
| Nov 25, 2020 Reel 54524, frame 20 | Sight Sciences, Inc. | Midcap Financial Trust, As Agent | Reaffirmed and Amended Security Interest (TERM) |
| Jul 24, 2023 Reel 64354, frame 155 | Midcap Funding IV Trust | Sight Sciences, Inc. | Release of Security Interest |
| Jan 23, 2024 Reel 66364, frame 162 | Sight Sciences, Inc. | Hercules Capital, Inc., as Agent | 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 2032
Term ends Oct 4, 2032. Maintenance fees still fall due before then
Note
The 129 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 10,179,066, US 8,894,603, US 9,095,412, US 9,216,109, US 9,855,167, US 9,895,258.
Citations
35
later US patents cite this one
That is top 5% of utility patents granted in 2021 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.