Term ends Dec 11, 2031 · High confidence
20-year base term ends Feb 25, 2029
Filed Feb 27, 2013 as application 13/779,571 · Granted Apr 10, 2018
Base term plus 1019 days of patent term adjustment (USPTO delay)
Today
2009
2031
Clock starts
Feb 25, 2009
Feb 25, 2009
Term ends
Dec 11, 2031
Dec 11, 2031
Granted
Apr 10, 2018
Apr 10, 2018
base term
patent term adjustment
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
1,019
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.
40
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 1019 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 Feb 25, 2009, when application 12/392,525, the earliest non-provisional in its chain, was filed (this one was filed Feb 27, 2013) | Feb 25, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1019 days, USPTO patent term adjustment record | Dec 11, 2031 | 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 | Dec 11, 2031 | High confidence |
This family
| US 8,420,258 | In force May 2031 | May 2031 |
| Application PCT/US2009/035195 | PCT application no patent term | no patent term |
| US 8,481,214 | In force Jan 2030 | Jan 2030 |
| Application 61/578,545 | Provisional application no patent term | no patent term |
| US 8,658,310 | In force Feb 2029 | Feb 2029 |
| US 8,652,683 | In force Feb 2029 | Feb 2029 |
| US 9,412,998 | Lapsed on the fee record Aug 2024 | Aug 2024 |
| US 9,941,709 | this patent Dec 2031 | Dec 2031 |
8 of 40 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 |
|---|---|---|---|
| Apr 26, 2013 Reel 30296, frame 442 | Rojeski, Ronald A. | Catalyst Power Technologies | Assignment of Assignor's Interest |
| Mar 29, 2016 Reel 38124, frame 115 | Catalyst Power Technologies, Inc. | CPT IP Holdings, LLC | Assignment of Assignor's Interest |
| Oct 12, 2016 Reel 39996, frame 478 | CPT IP Holdings, LLC | Traverse Technologies Corp. | Assignment of Assignor's Interest |
| Jan 11, 2017 Reel 41333, frame 1 | Motheye Technologies, LLC; Synchronicity IP LLC; Traverse Technologies Corp.; 3D Nanocolor Corp.; Bismarck IP Inc.; Magnus IP GmbH; Munitech IP S.À.R.L.; Vermilion Participations; Marathon Ventures S.À.R.L; Nyanza Properties; Marathon IP GmbH; Orthophoenix, LLC; Medtech Development Deutschland GmbH; Synchronicity IP GmbH; Tli Communications GmbH | DBD Credit Funding LLC, as Collateral Agent | Security Interest |
| Feb 28, 2018 Reel 45067, frame 778 | Traverse Technologies Corp. | CF Traverse LLC | Assignment of Assignor's Interest |
| Apr 13, 2018 Reel 45535, frame 786 | Traverse Technologies Corp. | CF Traverse LLC | Assignment of Assignor's Interest |
| Sep 3, 2024 Reel 68473, frame 389 | DBD Credit Funding LLC | CF Traverse LLC | Release of Security Interest |
| Nov 20, 2024 Reel 69347, frame 777 | CF Traverse LLC | Contemporary Amperex Technology (Hong Kong) Limited | 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
Dec 2031
Term ends Dec 11, 2031. Maintenance fees still fall due before then
Note
The 1019 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
73
later US patents cite this one
That is top 5% of utility patents granted in 2018 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.