Also listed on Gigawatt Day Storage Systems, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Mar 6, 2031 · High confidence
20-year base term ends Mar 4, 2031
Held by Malta Inc.
Filed Aug 23, 2018 as application 16/111,151 · Granted Feb 2, 2021
Base term plus 2 days of patent term adjustment (USPTO delay)
Today
2011
2031
Clock starts
Mar 4, 2011
Mar 4, 2011
Term ends
Mar 6, 2031
Mar 6, 2031
Granted
Feb 2, 2021
Feb 2, 2021
base term
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
2
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 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
4
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 2 days past its 20-year base term on prosecution delay. 1 of 2 maintenance fees is 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 Mar 4, 2011, when application 12/932,775, the earliest non-provisional in its chain, was filed (this one was filed Aug 23, 2018) | Mar 4, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +2 days, USPTO patent term adjustment record | Mar 6, 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 | 1 of 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 6, 2031 | High confidence |
This family
| Application 61/339,577 | Provisional application no patent term | no patent term |
| US 10,094,219 | Lapsed on the fee record Oct 2026 | Oct 2026 |
| US 9,932,830 | Lapsed on the fee record Apr 2026 | Apr 2026 |
| US 10,907,513 | this patent Mar 2031 | Mar 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 |
|---|---|---|---|
| Nov 20, 2018 Reel 47553, frame 272 | Laughlin, Robert B. | Gigawatt Day Storage Systems, Inc. | Assignment of Assignor's Interest |
| Nov 20, 2018 Reel 47553, frame 322 | Giga Watt-Day Storage Systems | Google Inc. | Assignment of Assignor's Interest |
| Nov 20, 2018 Reel 47553, frame 392 | X Development LLC | Google LLC | Assignment of Assignor's Interest |
| Nov 20, 2018 Reel 47553, frame 418 | Google LLC | Malta Inc. | Assignment of Assignor's Interest |
| Nov 20, 2018 Reel 47606, frame 183 | Google Inc. | X Development LLC | 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.
What's changing
Mar 2031
Term ends Mar 6, 2031. Maintenance fees still fall due before then
Note
The 2 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
97
later US patents cite this one
That is top 1% of utility patents granted in 2021 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.