Term ends Sep 27, 2027 · High confidence
20-year base term ended Aug 4, 2026
Filed May 8, 2009 as application 12/437,815 · Granted May 29, 2012
Base term plus 419 days of patent term adjustment (USPTO delay)
Today
2006
2027
Clock starts
Aug 4, 2006
Aug 4, 2006
Term ends
Sep 27, 2027
Sep 27, 2027
Granted
May 29, 2012
May 29, 2012
base term
patent term adjustment
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
419
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
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.
5
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 runs 419 days past its 20-year base term on 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 Aug 4, 2006, when application 11/499,120, the earliest non-provisional in its chain, was filed (this one was filed May 8, 2009) | Aug 4, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +419 days, USPTO patent term adjustment record | Sep 27, 2027 | 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 | Sep 27, 2027 | High confidence |
This family
| Application 11/499,120 | Abandoned not computed | not computed |
| US 7,853,150 | In force Jul 2029 | Jul 2029 |
| US 7,856,185 | Lapsed on the fee record Dec 2018 | Dec 2018 |
| US 7,534,054 | Term ended Aug 2026 | Aug 2026 |
| US 8,186,891 | this patent Sep 2027 | Sep 2027 |
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 |
|---|---|---|---|
| May 13, 2009 Reel 22677, frame 629 | Hudgins, Clay E. | Emcore Corporation | Assignment of Assignor's Interest |
| May 18, 2011 Reel 26304, frame 142 | Emcore Corporation; Emcore Solar Power, Inc. | Wells Fargo Bank, National Association | Security Agreement |
| May 11, 2012 reel/frame not recorded | Wells Fargo Bank, National Association | Emcore Corporation | Partial Release of Security Interest |
| May 11, 2012 reel/frame not recorded | Wells Fargo Bank, National Association | Emcore Solar Power, Inc. | Partial Release of Security Interest |
| May 11, 2012 Reel 28192, frame 189 | Wells Fargo Bank, National Association | Emcore Corporation; Emcore Solar Power, Inc. | Partial Release of Security Interest |
| Mar 15, 2013 Reel 30006, frame 126 | Emcore Corporation | Sumitomo Electric Device Innovations, U.S.A., 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
Sep 2027
Term ends Sep 27, 2027. No further fees fall due before then
Note
The 419 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
9
later US patents cite this one
That is above the median 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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.