Term ends Apr 28, 2037 · High confidence
20-year base term ends Apr 28, 2037
Held by Blue 425 LLC
Filed Apr 28, 2017 as application 15/581,263 · Granted May 19, 2020
Base term, 20 years from filing
Today
2017
2037
Clock starts
Apr 28, 2017
Apr 28, 2017
Term ends
Apr 28, 2037
Apr 28, 2037
Granted
May 19, 2020
May 19, 2020
base term
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
None
Term adjustment
No prosecution delay on this record.
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.
32
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 is its 20-year base term, with no adjustment for 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 Apr 28, 2017, when this application, 15/581,263, was filed | Apr 28, 2037 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | 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 | Apr 28, 2037 | High confidence |
This family
| Application PCT/US2014/035928 | PCT application no patent term | no patent term |
| US 10,562,132 | In force Apr 2037 | Apr 2037 |
| US 10,940,536 | In force Dec 2035 | Dec 2035 |
| US 10,971,896 | In force Sep 2035 | Sep 2035 |
| US 11,980,970 | In force Apr 2038 | Apr 2038 |
| US 12,220,764 | In force Dec 2039 | Dec 2039 |
| US 10,656,328 | this patent Apr 2037 | Apr 2037 |
| US 10,940,562 | In force Oct 2038 | Oct 2038 |
8 of 32 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 |
|---|---|---|---|
| Oct 9, 2018 Reel 47111, frame 741 | Zediker, Mark S; S.A., Matthew Silva; Tucker, James; Millick, Donald A; Stegeman, Robert | Nuburu, Inc. | Assignment of Assignor's Interest |
| Jan 8, 2024 Reel 66222, frame 257 | Nuburu, Inc. | Wilmington Savings Fund Society, FSB; Anson Investments Master Fund LP | Security Interest |
| Jan 8, 2024 reel/frame not recorded | Nuburu, Inc. | Wilmington Savings Fund Society, FSB | Security Interest |
| Jan 8, 2024 reel/frame not recorded | Nuburu, Inc. | Anson Investments Master Fund LP | Security Interest |
| Apr 28, 2025 Reel 71095, frame 702 | Nuburu, Inc. | Blue 425 LLC | Transfer Statement |
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
Apr 2037
Term ends Apr 28, 2037. Maintenance fees still fall due before then
Citations
14
later US patents cite this one
That is top 25% of utility patents granted in 2020 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.