Term ends Feb 22, 2031 · High confidence
20-year base term ends Nov 18, 2028
Filed Jun 8, 2009 as application 12/455,938 · Granted Dec 18, 2012
Base term plus 826 days of patent term adjustment (USPTO delay)
Today
2008
2031
Clock starts
Nov 18, 2008
Nov 18, 2008
Term ends
Feb 22, 2031
Feb 22, 2031
Granted
Dec 18, 2012
Dec 18, 2012
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
826
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.
9
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 826 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 Nov 18, 2008, when application PCT/US2008/012901, the earliest non-provisional in its chain, was filed (this one was filed Jun 8, 2009) | Nov 18, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +826 days, USPTO patent term adjustment record | Feb 22, 2031 | 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 (reinstated) | High confidence |
| Computed term end | The steps above, in order | Feb 22, 2031 | High confidence |
This family
| Application PCT/US2008/012901 | PCT application no patent term | no patent term |
| US 8,518,633 | In force Feb 2030 | Feb 2030 |
| US 8,182,982 | In force Feb 2030 | Feb 2030 |
| US 8,192,920 | In force (reinstated) no later than Mar 2030 | no later than Mar 2030 |
| US 8,334,217 | this patent Feb 2031 | Feb 2031 |
| US 8,318,386 | In force (reinstated) Feb 2030 | Feb 2030 |
| Application 13/066,473 | Abandoned not computed | not computed |
| US 9,645,504 | In force no later than Oct 2030 | no later than Oct 2030 |
8 of 9 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Jun 4, 2010 Reel 24488, frame 141 | Rolith, Inc. | Asahi Glass Co., Ltd. | Security Agreement |
| Aug 17, 2010 Reel 24848, frame 952 | Asahi Glass Co., Ltd. | Rolith, Inc. | Release of Security Interest |
| May 4, 2011 Reel 26218, frame 502 | Rolith, Inc. | AGC America, Inc. | Security Agreement |
| Nov 15, 2011 Reel 27227, frame 259 | Kobrin, Boris | Rolith, Inc. | Assignment of Assignor's Interest |
| Mar 29, 2012 Reel 27956, frame 587 | AGC America, Inc. | Rolith, Inc. | Release of Security Interest |
| Jun 17, 2016 Reel 38945, frame 136 | Rolith, Inc. | Metamaterial Technologies USA, Inc. | Assignment of Assignor's Interest |
| Apr 5, 2020 Reel 52315, frame 29 | Metamaterial Technologies USA, Inc. | BDC Capital Inc. | Security Interest |
| Jun 11, 2021 Reel 56522, frame 648 | BDC Capital Inc. | Metamaterial Technologies USA, Inc. | Release of Security Interest |
| Apr 17, 2025 Reel 70871, frame 818 | Christina Lovato, Chapter 7 Trustee of the Bankruptcy Estate of Meta Materials Inc. | E Ink Corporation | Court Appointment |
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
Feb 2031
Term ends Feb 22, 2031. No further fees fall due before then
Note
The 826 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
37
later US patents cite this one
That is top 25% 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.