Lapsed Feb 7, 2024 on the fee record · High confidence
20-year base term ends Mar 20, 2028
Third maintenance fee unpaid; grace period ended.
Held by Luminus Devices, Inc.
Filed Mar 20, 2008 as application 12/052,721 · Granted Feb 7, 2012
Base term, 20 years from filing
Today
Lapsed Feb 7, 2024
2008
2028
Clock starts
Mar 20, 2008
Mar 20, 2008
No longer in force
Feb 7, 2024
Feb 7, 2024
Granted
Feb 7, 2012
Feb 7, 2012
Term would have run to
Mar 20, 2028
Mar 20, 2028
base term
after the term ends
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.
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.
3
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Mar 20, 2028: its 20-year base term, with no adjustment for prosecution delay. 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 Mar 20, 2008, when this application, 12/052,721, was filed | Mar 20, 2028 | 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 | 2 of 3 maintenance fees paid | lapsed Feb 7, 2024 | High confidence |
| Computed term end | The steps above, in order | Feb 7, 2024 | High confidence |
This family
| US 8,110,425 | this patent Feb 2024 | Feb 2024 |
| US 8,455,285 | In force Mar 2028 | Mar 2028 |
| US 8,815,622 | In force no later than Mar 2028 | no later than Mar 2028 |
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 27, 2009 Reel 22319, frame 839 | Yun, Feng | Luminus Devices, Inc. | Assignment of Assignor's Interest |
| Jan 15, 2014 Reel 31976, frame 441 | Yun, Feng | Luminus Devices, Inc. | Assignment of Assignor's Interest |
| Oct 15, 2015 Reel 36869, frame 355 | Luminus Devices, Inc. | East West Bank | Security Interest |
| Jan 8, 2018 Reel 45020, frame 103 | East West Bank | Luminus Devices, 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.
Citations
155
later US patents cite this one
That is top 5% of utility patents granted in 2012 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.