Also listed on Firefly IP Co., LLC, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Dec 23, 2039 · High confidence
20-year base term ends Sep 26, 2039
Held by Firefly Aerospace Inc.
Filed Sep 26, 2019 as application 16/584,449 · Granted May 18, 2021
Base term plus 88 days of patent term adjustment (USPTO delay)
Today
2019
2039
Clock starts
Sep 26, 2019
Sep 26, 2019
Term ends
Dec 23, 2039
Dec 23, 2039
Granted
May 18, 2021
May 18, 2021
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
88
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.
3
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 88 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 Sep 26, 2019, when this application, 16/584,449, was filed | Sep 26, 2039 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +88 days, USPTO patent term adjustment record | Dec 23, 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 | Dec 23, 2039 | High confidence |
This family
| US 11,008,977 | this patent Dec 2039 | Dec 2039 |
| US 11,384,713 | In force Sep 2039 | Sep 2039 |
| US 11,692,515 | In force Sep 2039 | Sep 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 |
|---|---|---|---|
| Sep 26, 2019 Reel 50506, frame 998 | Borissov, Anatoli Alimpievich; Markusic, Thomas Edward | Firefly Aerospace Inc. | Assignment of Assignor's Interest |
| Oct 2, 2019 Reel 50601, frame 377 | Borissov, Anatoli Alimpievich; Markusic, Thomas Edward | Firefly Aerospace Inc. | Corrective Assignment to Correct the Correspondence Address Previously Recorded on Reel 050506 Frame 0998. Assignor(S) Hereby Confirms the Assignment. |
| 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
Dec 2039
Term ends Dec 23, 2039. Maintenance fees still fall due before then
Note
The 88 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
2
later US patents cite this one
That is above the median of utility patents granted in 2021 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.