Term ends Apr 11, 2038 · High confidence
20-year base term ends Feb 24, 2037
Held by Honeycomb Battery Company
Filed Feb 24, 2017 as application 15/442,278 · Granted Nov 17, 2020
Base term plus 411 days of patent term adjustment (USPTO delay)
Today
2017
2038
Clock starts
Feb 24, 2017
Feb 24, 2017
Term ends
Apr 11, 2038
Apr 11, 2038
Granted
Nov 17, 2020
Nov 17, 2020
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
411
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.
5
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 411 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 Feb 24, 2017, when this application, 15/442,278, was filed | Feb 24, 2037 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +411 days, USPTO patent term adjustment record | Apr 11, 2038 | 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 11, 2038 | High confidence |
This family
| US 10,840,502 | this patent Apr 2038 | Apr 2038 |
| Application PCT/US2018/016423 | PCT application no patent term | no patent term |
| Application 17/060,820 | Abandoned not computed | not computed |
| US 11,990,608 | In force Oct 2038 | Oct 2038 |
| US 11,978,904 | In force Nov 2037 | Nov 2037 |
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 |
|---|---|---|---|
| Feb 27, 2017 Reel 41386, frame 443 | He, Hui | Nanotek Instruments, Inc. | Assignment of Assignor's Interest |
| Mar 2, 2017 Reel 41434, frame 557 | Pan, Baofei | Nanotek Instruments, Inc. | Assignment of Assignor's Interest |
| Apr 13, 2017 Reel 42003, frame 179 | Jang, Bor Z. | Nanotek Instruments, Inc. | Assignment of Assignor's Interest |
| Apr 19, 2017 Reel 42060, frame 165 | Zhamu, Aruna | Nanotek Instruments, Inc. | Assignment of Assignor's Interest |
| Jun 7, 2017 Reel 42625, frame 884 | Pan, Baofei | Nanotek Instruments, Inc. | Assignment of Assignor's Interest |
| Jun 20, 2017 Reel 42754, frame 356 | He, Hui | Nanotek Instruments, Inc. | Assignment of Assignor's Interest |
| Jul 17, 2019 Reel 49784, frame 650 | Nanotek Instruments, Inc. | Global Graphene Group, Inc. | Assignment of Assignor's Interest |
| Feb 28, 2024 Reel 66957, frame 745 | Global Graphene Group, Inc. | Honeycomb Battery Company | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Apr 2038
Term ends Apr 11, 2038. Maintenance fees still fall due before then
Note
The 411 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
52
later US patents cite this one
That is top 5% 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.