Term ends Mar 6, 2035 · Medium confidence
20-year base term ends Mar 13, 2033
Why Medium: A parent in the chain could not be resolved.
Held by Lockheed Martin Energy, LLC
Filed May 6, 2013 as application 13/887,461 · Granted Mar 27, 2018
Base term plus 723 days of patent term adjustment (USPTO delay)
Today
2013
2035
Clock starts
Mar 13, 2013
Mar 13, 2013
Term ends
Mar 6, 2035
Mar 6, 2035
Granted
Mar 27, 2018
Mar 27, 2018
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
723
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.
10
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 723 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. Confidence: Medium. 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 Mar 13, 2013, when application PCT/US2013/030430, the earliest non-provisional in its chain, was filed (this one was filed May 6, 2013); a parent in its chain could not be resolved (the next row) | Mar 13, 2033 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +723 days, USPTO patent term adjustment record | Mar 6, 2035 | 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 | Mar 6, 2035 | Medium confidence |
This family
| US 9,929,425 | this patent Mar 2035 | Mar 2035 |
| US 9,997,798 | In force Aug 2033 | Aug 2033 |
| US 9,997,799 | In force Aug 2033 | Aug 2033 |
| US 9,742,021 | In force Mar 2033 | Mar 2033 |
| Application PCT/US2016/051880 | PCT application no patent term | no patent term |
| US 10,374,248 | In force May 2033 | May 2033 |
| US 11,349,141 | In force Jul 2033 | Jul 2033 |
| US 12,009,562 | In force Mar 2033 | Mar 2033 |
8 of 10 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 |
|---|---|---|---|
| Jul 16, 2013 Reel 30802, frame 63 | Esswein, Arthur J.; Goeltz, John; Amadeo, Desiree | Sun Catalytix Corporation | Assignment of Assignor's Interest |
| Jan 23, 2015 Reel 34795, frame 513 | Sun Catalytix Corporation | Lockheed Martin Advanced Energy Storage, LLC | Assignment of Assignor's Interest |
| Feb 25, 2015 Reel 35089, frame 681 | Sun Catalytix Corporation | Lockheed Martin Advanced Energy Storage, LLC | Corrective Assignment to Correct the Assignee Address Previously Recorded at Reel: 034795 Frame: 0513. Assignor(S) Hereby Confirms the Assignment. |
| Jul 12, 2018 Reel 46570, frame 550 | Lockheed Martin Advanced Energy Storage, LLC | Lockheed Martin Energy, LLC | Change of Name |
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
Mar 2035
Term ends Mar 6, 2035. Maintenance fees still fall due before then
Note
The 723 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
44
later US patents cite this one
That is top 10% 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.