Term ends no later than Mar 20, 2030 · Medium confidence

Computed 20-year base term

In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.

Held by Metamaterial Technologies USA, Inc.

Filed Apr 24, 2009 as application 12/386,899 · Granted Jun 5, 2012

Base term plus 487 days of patent term adjustment (USPTO delay)

Today

20 years from filing

Ends no later than Mar 20, 2030

2008 2030

Clock starts
Nov 18, 2008

Ends no later than
Mar 20, 2030

Granted
Jun 5, 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

487

Days of term adjustment

Read from the USPTO patent term adjustment record, not recalculated here.

Unresolved

Terminal disclaimer

On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.

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.

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 487 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. All three maintenance fees are recorded paid; no more fees are due. Confidence: Medium. 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 Apr 24, 2009)	Nov 18, 2028	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+487 days, USPTO patent term adjustment record	Mar 20, 2030	High confidence
Terminal disclaimer cap	Disclaimer on file (approved), reference document not resolved	no cap applied, and none guessed	Medium 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	no later than Mar 20, 2030	Medium 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	this patent no later than Mar 2030	no later than Mar 2030
US 8,334,217	In force (reinstated) 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 14, 2011 Reel 27223, frame 867	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

Mar 2030

Term ends no later than Mar 20, 2030. No further fees fall due before then

Note

A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed

Note

The 487 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us

Open question

A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Mar 20, 2030. We will not guess the cap.

Citations

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

This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. 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.

Lithography Method