Also listed on Firefly IP Co., LLC, an earlier holder on the record. The recorded assignments below show how it moved.

Term ends Mar 26, 2039 · High confidence

Computed 20-year base term

Held by Firefly Aerospace Inc.

Filed Jan 24, 2019 as application 16/256,210 · Granted Jul 19, 2022

Base term plus 61 days of patent term adjustment (USPTO delay)

Today

20 years from filing

Term ends Mar 26, 2039

2019 2039

Clock starts
Jan 24, 2019

Term ends
Mar 26, 2039

Granted
Jul 19, 2022

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

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.

This patent's term runs 61 days past its 20-year base term on prosecution delay. 1 of 3 maintenance fees is paid so far. 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 Jan 24, 2019, when this application, 16/256,210, was filed	Jan 24, 2039	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+61 days, USPTO patent term adjustment record	Mar 26, 2039	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	In force	High confidence
Computed term end	The steps above, in order	Mar 26, 2039	High confidence

This family

US 11,391,247	this patent Mar 2039	Mar 2039
US 11,746,729	In force Jan 2039	Jan 2039

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
Jan 24, 2019 Reel 48122, frame 680	Borissov, Anatoli Alimpievich; Markusic, Thomas Edward	Firefly Aerospace Inc.	Assignment of Assignor's Interest
Jul 25, 2023 Reel 64370, frame 925	Firefly Aerospace Inc.; Firefly Space Transport Services, LLC; Firefly Research, Inc.; Spaceflight, Inc.	Firefly IP Co., LLC	Assignment of Assignor's Interest
Jul 25, 2023 Reel 64371, frame 67	Firefly IP Co., LLC	Firefly Aerospace Inc.	License
Jul 25, 2023 Reel 64371, frame 825	Firefly Aerospace Inc.; Firefly Space Transport Services, LLC; Firefly Research, Inc.; Firefly IP Co., LLC; Firefly IP Holdings, LLC; Spaceflight, Inc.	U.S. Bank Trust Company, National Association, as Collateral Agent	Security Interest
Aug 8, 2025 reel/frame not recorded	U.S. Bank Trust Company, National Association, as Collateral Agent	Firefly Aerospace Inc.	Release of Security Interest
Aug 8, 2025 reel/frame not recorded	U.S. Bank Trust Company, National Association, as Collateral Agent	Firefly Space Transport Services, LLC	Release of Security Interest
Aug 8, 2025 reel/frame not recorded	U.S. Bank Trust Company, National Association, as Collateral Agent	Firefly Research, Inc.	Release of Security Interest
Aug 8, 2025 reel/frame not recorded	U.S. Bank Trust Company, National Association, as Collateral Agent	Firefly IP Co., LLC	Release of Security Interest
Aug 8, 2025 reel/frame not recorded	U.S. Bank Trust Company, National Association, as Collateral Agent	Firefly IP Holdings, LLC	Release of Security Interest
Aug 8, 2025 reel/frame not recorded	U.S. Bank Trust Company, National Association, as Collateral Agent	Spaceflight, Inc.	Release of Security Interest
Aug 8, 2025 Reel 72343, frame 126	Firefly Aerospace Inc.	Wells Fargo Bank, National Association, as Administrative Agent	Security Agreement
Aug 8, 2025 Reel 71975, frame 832	U.S. Bank Trust Company, National Association, as Collateral Agent	Firefly Aerospace Inc.; Firefly Space Transport Services, LLC; Firefly Research, Inc.; Firefly IP Co., LLC; Firefly IP Holdings, LLC; Spaceflight, Inc.	Release of Security Interest
Aug 11, 2025 Reel 71987, frame 853	Firefly IP Holdings, LLC; Firefly IP Co., LLC	Firefly Aerospace Inc.	Merger
Aug 11, 2025 Reel 72412, frame 838	Firefly IP Co., LLC	Firefly Aerospace Inc.	Termination of Intellectual Property License Agreement Release of R/F 64371/0067

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

Mar 2039

Term ends Mar 26, 2039. Maintenance fees still fall due before then

Note

The 61 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us

Citations

later US patent cites this one

That is below the median of utility patents granted in 2022 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.

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