Term ends May 30, 2033 · 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 Jul 11, 2017 as application 15/647,190 · Granted Aug 6, 2019
Base term plus 78 days of patent term adjustment (USPTO delay)
Today
2013
2033
Clock starts
Mar 13, 2013
Mar 13, 2013
Term ends
May 30, 2033
May 30, 2033
Granted
Aug 6, 2019
Aug 6, 2019
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
78
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.
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 78 days past its 20-year base term on prosecution delay. 1 of 3 maintenance fees is 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 Jul 11, 2017); 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 | +78 days, USPTO patent term adjustment record | May 30, 2033 | 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 | May 30, 2033 | Medium confidence |
This family
| US 9,929,425 | In force 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 | this patent 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 12, 2017 Reel 43177, frame 72 | Esswein, Arthur J.; Goeltz, John; Amadeo, Desiree | Lockheed Martin Advanced Energy Storage, LLC | Assignment of Assignor's Interest |
| 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.
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Alerts on its grants, lapses and transfers.
What's changing
May 2033
Term ends May 30, 2033. Maintenance fees still fall due before then
Note
The 78 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
0
later US patents cite this one
That is below the median of utility patents granted in 2019 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.