Also listed on Future Light Co. Ltd., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Apr 24, 2029 · High confidence
20-year base term ends Apr 24, 2029
Held by Ledvance GmbH
Filed Apr 24, 2009 as application 12/429,854 · Granted Sep 20, 2011
Base term, 20 years from filing
Today
2009
2029
Clock starts
Apr 24, 2009
Apr 24, 2009
Term ends
Apr 24, 2029
Apr 24, 2029
Granted
Sep 20, 2011
Sep 20, 2011
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.
None
Terminal disclaimer
No disclaimer on this record.
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.
This patent's term is its 20-year base term, with no adjustment for prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 Apr 24, 2009, when this application, 12/429,854, was filed | Apr 24, 2029 | 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 | None on record | no cap applied | High 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 | Apr 24, 2029 | 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 |
|---|---|---|---|
| Apr 24, 2009 Reel 22595, frame 116 | Miyake, Yasuto; Hiroyama, Ryoji; Hata, Masayuki; Kuno, Yasumitsu | Sanyo Electric Co., Ltd. | Assignment of Assignor's Interest |
| Mar 30, 2012 Reel 27957, frame 258 | Sanyo Electric Co., Ltd. | Future Light, LLC | Assignment of Assignor's Interest |
| Nov 1, 2016 Reel 40523, frame 797 | Future Light Limited Liability Company | Sanyo Electric Co., Ltd. | Assignment of Assignor's Interest |
| Mar 20, 2017 Reel 41652, frame 122 | Sanyo Electric Co., Ltd. | Epistar Corporation | Assignment of Assignor's Interest |
| Nov 6, 2023 Reel 65469, frame 5 | Epistar Corporation | Ledvance GmbH | 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.
What's changing
Apr 2029
Term ends Apr 24, 2029. No further fees fall due before then
Citations
289
later US patents cite this one
That is top 5% of utility patents granted in 2011 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.