Lapsed Mar 8, 2019 on the fee record · High confidence

Computed 20-year base term

Second maintenance fee unpaid; grace period ended.

Held by FTC Solar, Inc.

Filed May 18, 2007 as application 11/750,948 · Granted Mar 8, 2011

Base term, 20 years from filing, plus 709 days of patent term adjustment (USPTO delay)

Today

Lapsed Mar 8, 2019

2004 2026

Clock starts
May 26, 2004

No longer in force
Mar 8, 2019

Granted
Mar 8, 2011

Term would have run to
May 5, 2026

base term patent term adjustment after the term ends 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

709

Days of term adjustment

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

None

Terminal disclaimer

No disclaimer on this record.

1 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.

Its term would have run to May 5, 2026: its 20-year base term plus 709 days of term 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 May 26, 2004, when application 10/855,254, the earliest non-provisional in its chain, was filed (this one was filed May 18, 2007)	May 26, 2024	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+709 days, USPTO patent term adjustment record	May 5, 2026	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	1 of 3 maintenance fees paid	lapsed Mar 8, 2019	High confidence
Computed term end	The steps above, in order	Mar 8, 2019	High confidence

This family

US 8,344,239	Term ended Oct 2026	Oct 2026
US 7,856,769	Lapsed on the fee record Dec 2018	Dec 2018
US 7,900,407	this patent Mar 2019	Mar 2019
Application 11/836,140	Abandoned not computed	not computed
Application 12/367,977	Abandoned not computed	not computed
US 8,272,176	Lapsed on the fee record Sep 2024	Sep 2024
US 8,256,170	Term ended May 2024	May 2024
US 8,656,659	Lapsed on the fee record Feb 2018	Feb 2018

8 of 28 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
Jul 20, 2007 Reel 19585, frame 364	Plaisted, Joshua Reed	Kineo Design Group, LLC	Assignment of Assignor's Interest
Mar 21, 2008 Reel 20685, frame 963	Kineo Design Group, LLC	PVT Solar, LLC	Assignment of Assignor's Interest
Apr 11, 2008 Reel 20792, frame 776	PVT Solar, LLC	PVT Solar, Inc.	Statement of Conversion
Mar 18, 2013 Reel 30036, frame 707	PVT Solar, Inc.	Triplepoint Capital LLC	Security Agreement
Oct 27, 2014 Reel 34040, frame 730	PVT Solar, Inc.	SunEdison, Inc.	Assignment of Assignor's Interest
Aug 11, 2015 Reel 36329, frame 470	SunEdison, Inc.; Sun Edison LLC; Solaicx; NVT, LLC	Goldman Sachs Bank USA, as Administrative Agent	Security Interest
Jan 12, 2016 Reel 37485, frame 343	SunEdison, Inc.; Sun Edison LLC; Solaicx	Wells Fargo Bank, National Association, as Administrative Agent	Security Interest
Jan 13, 2016 Reel 37508, frame 606	SunEdison, Inc.; Sun Edison LLC; Solaicx; NVT, LLC	Wilmington Trust, National Association, Solely in Its Capacity as Collateral Trustee	Security Interest
Jan 13, 2016 Reel 37508, frame 884	Goldman Sachs Bank USA, as Administrative Agent	SunEdison, Inc.; Sun Edison LLC; Solaicx; NVT, LLC	Release of Security Interest
Jan 13, 2016 reel/frame not recorded	Goldman Sachs Bank USA, as Administrative Agent	SunEdison, Inc.	Release of Security Interest
Jan 13, 2016 reel/frame not recorded	Goldman Sachs Bank USA, as Administrative Agent	Sun Edison LLC	Release of Security Interest
Jan 13, 2016 reel/frame not recorded	Goldman Sachs Bank USA, as Administrative Agent	Solaicx	Release of Security Interest
Jan 13, 2016 reel/frame not recorded	Goldman Sachs Bank USA, as Administrative Agent	NVT, LLC	Release of Security Interest
Apr 28, 2016 Reel 38557, frame 472	SunEdison, Inc.	Deutsche Bank AG New York Branch, as Administrative Agent	Patent Security Agreement
Aug 16, 2017 Reel 43569, frame 300	SunEdison Inc.; SunEdison Utility Holdings, Inc.; PVT Solar, Inc.; SunEdison Products Singapore Pte. Ltd.	FTC Solar, 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.

What's changing

Note

The 709 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us

Citations

later US patents cite this one

That is top 10% 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.

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