Collateral for a security interest recorded Feb 10, 2022 (JPMorgan Chase Bank, N.A., as Administrative Assistant).
Term ends Sep 26, 2037 · High confidence
20-year base term ends Sep 25, 2037
Held by DZS, Inc.
Filed Sep 25, 2017 as application 15/714,586 · Granted Apr 7, 2020
Base term plus 1 days of patent term adjustment (USPTO delay)
Today
2017
2037
Clock starts
Sep 25, 2017
Sep 25, 2017
Term ends
Sep 26, 2037
Sep 26, 2037
Granted
Apr 7, 2020
Apr 7, 2020
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
1
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 1 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 Sep 25, 2017, when this application, 15/714,586, was filed | Sep 25, 2037 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1 days, USPTO patent term adjustment record | Sep 26, 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 | Sep 26, 2037 | High confidence |
This family
| US 10,616,039 | this patent Sep 2037 | Sep 2037 |
| Application 17/715,892 | Abandoned not computed | not computed |
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 |
|---|---|---|---|
| Sep 25, 2017 Reel 43684, frame 735 | Lee, Seung Dong; Kim, Il Yung; Kim, Kyeong Baek | Dasan Zhone Solutions, Inc. | Assignment of Assignor's Interest |
| Feb 3, 2022 Reel 58876, frame 770 | Dasan Zhone Solutions, Inc. | DZS, Inc. | Change of Name |
| Feb 10, 2022 Reel 58984, frame 564 | DZS Inc. | JPMorgan Chase Bank, N.A., as Administrative Assistant | Security 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
Sep 2037
Term ends Sep 26, 2037. Maintenance fees still fall due before then
Note
The 1 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
2
later US patents cite this one
That is below the median 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.