Lapsed Apr 3, 2026 on the fee record · High confidence
20-year base term ends Mar 4, 2031
Second maintenance fee unpaid; grace period ended.
Held by Malta Inc.
Filed Aug 12, 2013 as application 13/965,048 · Granted Apr 3, 2018
Base term, 20 years from filing, plus 475 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
Lapsed Apr 3, 2026
2011
2031
Clock starts
Mar 4, 2011
Mar 4, 2011
No longer in force
Apr 3, 2026
Apr 3, 2026
Granted
Apr 3, 2018
Apr 3, 2018
Term would have run to
May 10, 2031
May 10, 2031
base term
patent term adjustment
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
475
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 10,094,219.
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.
4
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 May 10, 2031: its 20-year base term plus 475 days of term adjustment for prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 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 12, 2013) | Mar 4, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +475 days, USPTO patent term adjustment record | Jun 21, 2032 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,094,219) | capped to May 10, 2031 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | lapsed Apr 3, 2026 | High confidence |
| Computed term end | The steps above, in order | Apr 3, 2026 | 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 | this patent Apr 2026 | Apr 2026 |
| US 10,907,513 | In force 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 |
|---|---|---|---|
| Oct 3, 2013 Reel 31342, frame 942 | Laughlin, Robert B. | Gigawatt Day Storage Systems, Inc. | Assignment of Assignor's Interest |
| Nov 14, 2016 Reel 40312, frame 385 | Gigawatt Day Storage Systems, Inc. | Google Inc. | Assignment of Assignor's Interest |
| Oct 6, 2017 Reel 44144, frame 1 | Google Inc. | Google LLC | Change of Name |
| Nov 27, 2017 Reel 44511, frame 347 | Google Inc. | X Development LLC | Assignment of Assignor's Interest |
| Dec 28, 2017 Reel 44969, frame 101 | Google Inc. | X Development LLC | 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 4, 2024 Reel 68092, frame 502 | Google Inc. | Google LLC | Corrective Assignment to Correct the the Removal of the Incorrectly Recorded Application Numbers 14/149802 and 15/419313 Previously Recorded at Reel: 44144 Frame: 1. Assignor(S) Hereby Confirms the 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
Note
The 475 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 10,094,219.
Citations
76
later US patents cite this one
That is top 5% 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.