Also listed on Quantapore, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Nov 29, 2037 · High confidence
20-year base term ends Jun 22, 2037
Held by Switchback Systems, Inc.
Filed Dec 11, 2018 as application 16/309,097 · Granted Nov 3, 2020
Base term plus 160 days of patent term adjustment (USPTO delay)
Today
2017
2037
Clock starts
Jun 22, 2017
Jun 22, 2017
Term ends
Nov 29, 2037
Nov 29, 2037
Granted
Nov 3, 2020
Nov 3, 2020
base term
patent term adjustment
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
160
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 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.
2
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 160 days past its 20-year base term on prosecution delay. 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 Jun 22, 2017, when application PCT/US2017/038813, the earliest non-provisional in its chain, was filed (this one was filed Dec 11, 2018) | Jun 22, 2037 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +160 days, USPTO patent term adjustment record | Nov 29, 2037 | 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 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Nov 29, 2037 | High confidence |
This family
| Application PCT/US2017/038813 | PCT application no patent term | no patent term |
| US 10,823,721 | this patent Nov 2037 | Nov 2037 |
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 |
|---|---|---|---|
| Dec 20, 2018 Reel 47836, frame 112 | Anderson, Brett N. | Quantapore, Inc. | Assignment of Assignor's Interest |
| Nov 22, 2024 Reel 69387, frame 139 | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Nov 2037
Term ends Nov 29, 2037. Maintenance fees still fall due before then
Note
The 160 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
13
later US patents cite this one
That is top 25% of utility patents granted in 2020 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.