Also listed on Gigawatt Day Storage Systems, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends May 10, 2031 · High confidence
20-year base term ends Sep 27, 2033
Held by Malta Inc.
Filed Feb 23, 2017 as application 15/440,289 · Granted Oct 15, 2019
Base term plus 139 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2013
2033
Clock starts
Sep 27, 2013
Sep 27, 2013
Term ends
May 10, 2031
May 10, 2031
Granted
Oct 15, 2019
Oct 15, 2019
base term
after the term ends
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
139
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 10,012,448.
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.
15
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 139 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 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 Sep 27, 2013, when application PCT/US2013/062469, the earliest non-provisional in its chain, was filed (this one was filed Feb 23, 2017) | Sep 27, 2033 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +139 days, USPTO patent term adjustment record | Feb 13, 2034 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,012,448) | capped to May 10, 2031 | 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 | May 10, 2031 | High confidence |
This family
| Application 61/706,337 | Provisional application no patent term | no patent term |
| Application 61/868,070 | Provisional application no patent term | no patent term |
| Application PCT/US2013/062469 | PCT application no patent term | no patent term |
| US 10,012,448 | Lapsed on the fee record Jul 2026 | Jul 2026 |
| US 10,458,721 | In force Oct 2033 | Oct 2033 |
| US 10,288,357 | In force Jun 2034 | Jun 2034 |
| US 10,422,250 | In force May 2031 | May 2031 |
| US 10,428,693 | In force Jan 2034 | Jan 2034 |
8 of 15 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 |
|---|---|---|---|
| Nov 13, 2017 Reel 44104, frame 185 | Larochelle, Philippe; Laughlin, Robert B.; Cizak, Nicholas | Gigawatt Day Storage Systems, Inc. | Assignment of Assignor's Interest |
| Nov 13, 2017 Reel 44104, frame 200 | Gigawatt Day Storage Systems | Google Inc. | Assignment of Assignor's Interest |
| Nov 27, 2017 Reel 44511, frame 347 | Google Inc. | X Development LLC | Assignment of Assignor's Interest |
| Aug 7, 2018 Reel 46575, frame 607 | Laughlin, Robert B.; Larochelle, Philippe; Cizek, Nicholas | Gigawatt Day Storage Systems, Inc. | Assignment of Assignor's Interest |
| Jan 4, 2019 Reel 47905, frame 128 | X Development LLC | Google LLC | Assignment of Assignor's Interest |
| Jan 4, 2019 Reel 47905, frame 168 | Google LLC | Malta Inc. | Assignment of Assignor's Interest |
| Mar 6, 2019 Reel 48516, frame 565 | Larochelle, Philippe; Laughlin, Robert B.; Cizek, Nicholas | Gigawatt Day Storage Systems, Inc. | Corrective Assignment to Correct the Spelling of Inventors Name Previously Recorded at Reel: 044104 Frame: 0185. Assignor(S) Hereby Confirms the Assignment. |
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
May 2031
Term ends May 10, 2031. Maintenance fees still fall due before then
Note
The 139 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 10,012,448.
Citations
74
later US patents cite this one
That is top 5% 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.