Term ends Feb 26, 2034 · High confidence
20-year base term ends May 1, 2033
Filed May 1, 2013 as application 13/874,928 · Granted Sep 1, 2015
Base term plus 301 days of patent term adjustment (USPTO delay)
Today
2013
2034
Clock starts
May 1, 2013
May 1, 2013
Term ends
Feb 26, 2034
Feb 26, 2034
Granted
Sep 1, 2015
Sep 1, 2015
base term
patent term adjustment
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
301
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 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.
This patent's term runs 301 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are 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 1, 2013, when this application, 13/874,928, was filed | May 1, 2033 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +301 days, USPTO patent term adjustment record | Feb 26, 2034 | 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Feb 26, 2034 | High confidence |
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 16, 2013 Reel 31024, frame 370 | Xiong, Wei | Universal Lighting Technologies, Inc. | Assignment of Assignor's Interest |
| Mar 15, 2021 Reel 55599, frame 86 | Universal Lighting Technologies, Inc.; Douglas Lighting Controls, Inc. | FGI Worldwide LLC | Security Interest |
| Aug 14, 2023 Reel 64585, frame 271 | FGI Worldwide LLC | Universal Lighting Technologies, Inc.; Douglas Lighting Controls, Inc. | Release of Security Interest |
| Aug 14, 2023 reel/frame not recorded | FGI Worldwide LLC | Universal Lighting Technologies, Inc. | Release of Security Interest |
| Aug 14, 2023 reel/frame not recorded | FGI Worldwide LLC | Douglas Lighting Controls, 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 2034
Term ends Feb 26, 2034. Maintenance fees still fall due before then
Note
The 301 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
8
later US patents cite this one
That is above the median of utility patents granted in 2015 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.