Also listed on Quantapore, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Oct 23, 2035 · High confidence
20-year base term ends Oct 23, 2035
Held by Switchback Systems, Inc.
Filed Aug 27, 2019 as application 16/553,040 · Granted Jun 22, 2021
Base term plus 120 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2015
2035
Clock starts
Oct 23, 2015
Oct 23, 2015
Term ends
Oct 23, 2035
Oct 23, 2035
Granted
Jun 22, 2021
Jun 22, 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
120
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 9,624,537.
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.
3
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 120 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 1 of 3 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 Oct 23, 2015, when application 14/922,038, the earliest non-provisional in its chain, was filed (this one was filed Aug 27, 2019) | Oct 23, 2035 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +120 days, USPTO patent term adjustment record | Feb 20, 2036 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 9,624,537) | capped to Oct 23, 2035 | 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 | Oct 23, 2035 | High confidence |
This family
| US 9,624,537 | In force Oct 2035 | Oct 2035 |
| Application 15/453,542 | Abandoned not computed | not computed |
| US 11,041,197 | this patent Oct 2035 | Oct 2035 |
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 |
|---|---|---|---|
| Aug 27, 2019 Reel 50187, frame 282 | Huber, Martin; Davidson, Stuart | Quantapore, Inc. | Assignment of Assignor's Interest |
| Nov 22, 2024 Reel 69387, frame 105 | Quantapore, Inc. | Switchback Systems, Inc. | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Oct 2035
Term ends Oct 23, 2035. Maintenance fees still fall due before then
Note
The 120 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 9,624,537.
Citations
0
later US patents cite this one
That is below the median 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.