Term ends Nov 1, 2032 · High confidence
20-year base term ends Aug 30, 2031
Held by Honeycomb Battery Company
Filed Aug 30, 2011 as application 13/199,450 · Granted Nov 18, 2014
Base term plus 429 days of patent term adjustment (USPTO delay)
Today
2011
2032
Clock starts
Aug 30, 2011
Aug 30, 2011
Term ends
Nov 1, 2032
Nov 1, 2032
Granted
Nov 18, 2014
Nov 18, 2014
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
429
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 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.
8
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 429 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are 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 Aug 30, 2011, when this application, 13/199,450, was filed | Aug 30, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +429 days, USPTO patent term adjustment record | Nov 1, 2032 | 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Nov 1, 2032 | High confidence |
This family
| US 9,166,252 | In force no later than Oct 2031 | no later than Oct 2031 |
| US 8,859,143 | In force Oct 2032 | Oct 2032 |
| US 8,889,298 | this patent Nov 2032 | Nov 2032 |
| Application PCT/US2011/064827 | PCT application no patent term | no patent term |
| US 10,326,168 | In force Aug 2033 | Aug 2033 |
| US 11,038,205 | Lapsed on the fee record Jun 2025 | Jun 2025 |
| US 10,770,755 | In force Jan 2031 | Jan 2031 |
| US 11,189,859 | In force Jan 2031 | Jan 2031 |
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 |
|---|---|---|---|
| May 16, 2013 Reel 30438, frame 856 | Zhamu, Aruna; Liu, Chenguang; Jang, Bor Z.; Wang, Xiqing | Nanotek Instruments, Inc. | Assignment of Assignor's Interest |
| Apr 13, 2016 Reel 38426, frame 856 | Wang, Xiqing | Nanotek Instruments, Inc. | Assignment of Assignor's Interest |
| Apr 13, 2016 Reel 38428, frame 440 | Liu, Chenguang | Nanotek Instruments, Inc. | Assignment of Assignor's Interest |
| Apr 18, 2016 Reel 38454, frame 993 | Liu, Chenguang | Nanotek Instruments, Inc. | Assignment of Assignor's Interest |
| Apr 19, 2016 Reel 38463, frame 95 | Zhamu, Aruna | Nanotek Instruments, Inc. | Assignment of Assignor's Interest |
| Apr 19, 2016 Reel 38464, frame 403 | Jang, Bor Z. | 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 |
| Jul 18, 2019 Reel 49787, frame 643 | Nanotek Instruments, Inc. | Nanotek Instruments Group, LLC | Assignment of Assignor's Interest |
| Feb 28, 2024 Reel 66591, frame 577 | 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
Nov 2032
Term ends Nov 1, 2032.
Note
The 429 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
28
later US patents cite this one
That is top 25% of utility patents granted in 2014 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.