Also listed on Ecosense Lighting Inc., an earlier holder on the record. The recorded assignments below show how it moved.

Term ends no later than Feb 9, 2035 · Medium confidence

Computed 20-year base term

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 Korrus, Inc.

Filed Oct 11, 2020 as application 17/067,744 · Granted Apr 19, 2022

Base term, 20 years from filing

Today

20 years from filing

Ends no later than Feb 9, 2035

2015 2035

Clock starts
Feb 9, 2015

Ends no later than
Feb 9, 2035

Granted
Apr 19, 2022

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.

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.

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. 1 of 3 maintenance fees is paid so far. 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 9, 2015, when application 14/617,849, the earliest non-provisional in its chain, was filed (this one was filed Oct 11, 2020)	Feb 9, 2035	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	1 of 3 maintenance fees paid	In force	High confidence
Computed term end	The steps above, in order	no later than Feb 9, 2035	Medium confidence

This family

US 9,869,450	In force Feb 2035	Feb 2035
Application PCT/US2016/016972	PCT application no patent term	no patent term
Application 15/835,610	Abandoned not computed	not computed
Application PCT/US2018/016662	PCT application no patent term	no patent term
US 10,378,726	In force Feb 2035	Feb 2035
US 10,801,696	In force Feb 2035	Feb 2035
US 11,306,897	this patent no later than Feb 2035	no later than Feb 2035
Application PCT/US2021/071807	PCT application no patent term	no patent term

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
Feb 21, 2022 Reel 59239, frame 614	Ecosense Lighting Inc.	Korrus, Inc.	Nunc Pro Tunc Assignment
Feb 22, 2022 Reel 59069, frame 291	Latsis, Chris P; Rodgers, Elizabeth; Pickard, Paul; Ashraf, Sana; Zhang, Xin; Wu, Richard; Petluri, Raghuram L.v.	Ecosense Lighting 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.

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

What's changing

Feb 2035

Term ends no later than Feb 9, 2035. Maintenance fees still 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 9, 2035. We will not guess the cap.

Citations

later US patent cites this one

That is below the median 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

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.

Lighting Systems Generating Partially-Collimated Light Emissions