Collateral for a security interest recorded Jan 28, 2019 (Midcap Financial Trust).
Term ends no later than Feb 3, 2031 · Medium confidence
20-year base term ends Feb 3, 2031
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 Sight Sciences, Inc.
Filed Sep 26, 2011 as application 13/245,811 · Granted May 14, 2013
Base term, 20 years from filing
Today
2011
2031
Clock starts
Feb 3, 2011
Feb 3, 2011
Ends no later than
Feb 3, 2031
Feb 3, 2031
Granted
May 14, 2013
May 14, 2013
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
None
Term adjustment
No prosecution delay on this record.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
3 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.
9
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 on file with no resolved reference, so no cap is applied and none is guessed. All three maintenance fees are recorded paid; no more fees are due. 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 Feb 3, 2011, when application 13/020,706, the earliest non-provisional in its chain, was filed (this one was filed Sep 26, 2011) | Feb 3, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | no later than Feb 3, 2031 | Medium confidence |
This family
| US 8,529,622 | In force Feb 2031 | Feb 2031 |
| US 8,439,972 | this patent no later than Feb 2031 | no later than Feb 2031 |
| US 8,876,898 | In force Feb 2031 | Feb 2031 |
| Application 14/527,292 | Abandoned not computed | not computed |
| Application 15/343,147 | Abandoned not computed | not computed |
| US 10,406,030 | In force Feb 2031 | Feb 2031 |
| US 11,166,847 | In force Mar 2031 | Mar 2031 |
| US 12,171,689 | In force no later than Jun 2032 | no later than Jun 2032 |
8 of 9 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 |
|---|---|---|---|
| Nov 2, 2011 Reel 27165, frame 180 | Badawi, David Y.; 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
Feb 2031
Term ends no later than Feb 3, 2031. No further fees 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
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Feb 3, 2031. We will not guess the cap.
Citations
100
later US patents cite this one
That is top 10% of utility patents granted in 2013 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.