Lapsed Jan 31, 2021 on the fee record · High confidence
20-year base term ends Jan 21, 2036
First maintenance fee unpaid; grace period ended.
Held by Lockheed Martin Corporation
Filed Jan 21, 2016 as application 15/003,590 · Granted Jan 31, 2017
Base term, 20 years from filing
Today
Lapsed Jan 31, 2021
2016
2036
Clock starts
Jan 21, 2016
Jan 21, 2016
No longer in force
Jan 31, 2021
Jan 31, 2021
Granted
Jan 31, 2017
Jan 31, 2017
Term would have run to
Jan 21, 2036
Jan 21, 2036
base term
after the term ends
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
None
Term adjustment
No prosecution delay on this record.
None
Terminal disclaimer
No disclaimer on this record.
0 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.
66
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Jan 21, 2036: its 20-year base term, with no adjustment for prosecution delay. 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 Jan 21, 2016, when this application, 15/003,590, was filed | Jan 21, 2036 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | 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 | 0 of 3 maintenance fees paid | lapsed Jan 31, 2021 | High confidence |
| Computed term end | The steps above, in order | Jan 31, 2021 | High confidence |
This family
| US 9,638,821 | Lapsed on the fee record May 2025 | May 2025 |
| Application PCT/US2015/021093 | PCT application no patent term | no patent term |
| US 9,853,837 | In force Apr 2035 | Apr 2035 |
| Application PCT/US2015/024265 | PCT application no patent term | no patent term |
| US 9,590,601 | Lapsed on the fee record Mar 2021 | Mar 2021 |
| US 10,168,393 | In force Sep 2036 | Sep 2036 |
| US 9,614,589 | Lapsed on the fee record Apr 2025 | Apr 2025 |
| US 9,557,391 | this patent Jan 2021 | Jan 2021 |
8 of 66 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
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.
Citations
52
later US patents cite this one
That is top 10% of utility patents granted in 2017 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.