Also listed on Inphase Technologies, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Jan 28, 2029 · High confidence
20-year base term ends Apr 9, 2028
Held by Covestro Deutschland AG
Filed Apr 9, 2008 as application 12/099,967 · Granted Nov 8, 2011
Base term plus 796 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2008
2029
Clock starts
Apr 9, 2008
Apr 9, 2008
Term ends
Jan 28, 2029
Jan 28, 2029
Granted
Nov 8, 2011
Nov 8, 2011
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
796
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 7,879,509, US 7,981,987.
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 runs 796 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 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 9, 2008, when this application, 12/099,967, was filed | Apr 9, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +796 days, USPTO patent term adjustment record | Jun 14, 2030 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 7,879,509, US 7,981,987) | capped to Jan 28, 2029 | 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 | Jan 28, 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 |
|---|---|---|---|
| Sep 4, 2008 Reel 21479, frame 424 | Stoeckel, Nicolas; Bruder, Friedrich-karl | Bayer MaterialScience AG | Assignment of Assignor's Interest |
| Nov 26, 2008 Reel 21894, frame 889 | Askham, Fredric R.; Cole, Michael; Dhar, Lisa; Michaels, Mark D.; Miller, Sam; Quirin, Sean; Setthachayanon, Songvit; Trentler, Timothy J.; Lemon, Marianela T. | Inphase Technologies | Assignment of Assignor's Interest |
| Dec 5, 2013 Reel 31720, frame 160 | Inphase Technologies, Inc. | Acadia Woods Partners, LLC | Assignment of Assignor's Interest |
| Dec 5, 2013 Reel 31720, frame 186 | Acadia Woods Partners, LLC | Akonia Holographies, LLC | Assignment of Assignor's Interest |
| Oct 24, 2016 Reel 40261, frame 201 | Bayer MaterialScience AG | Covestro Deutschland AG | Change of Name |
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
Jan 2029
Term ends Jan 28, 2029. No further fees fall due before then
Note
The 796 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 7,879,509, US 7,981,987.
Citations
15
later US patents cite this one
That is above the median 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.