Term ends Jan 3, 2038 · High confidence
20-year base term ends Apr 29, 2036
Held by Flodesign Sonics, Inc.
Filed May 23, 2019 as application 16/421,459 · Granted Jul 25, 2023
Base term plus 614 days of patent term adjustment (USPTO delay)
Today
2016
2038
Clock starts
Apr 29, 2016
Apr 29, 2016
Term ends
Jan 3, 2038
Jan 3, 2038
Granted
Jul 25, 2023
Jul 25, 2023
base term
patent term adjustment
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
614
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
0 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.
17
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 614 days past its 20-year base term on prosecution delay. 0 of 3 maintenance fees are 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 Apr 29, 2016, when application 15/143,481, the earliest non-provisional in its chain, was filed (this one was filed May 23, 2019) | Apr 29, 2036 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +614 days, USPTO patent term adjustment record | Jan 3, 2038 | 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 | 0 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jan 3, 2038 | High confidence |
This family
| US 9,670,477 | Lapsed on the fee record Jun 2025 | Jun 2025 |
| Application 15/222,800 | Abandoned not computed | not computed |
| US 10,640,760 | Lapsed on the fee record May 2024 | May 2024 |
| US 10,550,382 | In force May 2036 | May 2036 |
| US 11,420,136 | Lapsed on the fee record Aug 2026 | Aug 2026 |
| US 11,377,651 | Lapsed on the fee record Jul 2026 | Jul 2026 |
| US 11,085,035 | Lapsed on the fee record Aug 2025 | Aug 2025 |
| US 11,021,699 | Lapsed on the fee record Jun 2025 | Jun 2025 |
8 of 17 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 |
|---|---|---|---|
| Aug 21, 2019 Reel 50110, frame 800 | Lipkens, Bart; Chitale, Kedar C.; Kumar, Krishna N.; Presz, Walter M., JR.; Zhang, Ruan; Ross-johnsrud, Benjamin; Gilmanshin, Rudolf; Rodionova, Natalia; Tostoes, Rui | Flodesign Sonics, Inc. | Assignment of Assignor's Interest |
| Mar 3, 2022 Reel 59317, frame 507 | Flodesign Sonics, Inc. | Flodesign Sonics, Inc. | Change of Address |
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
Jan 2038
Term ends Jan 3, 2038. Maintenance fees still fall due before then
Note
The 614 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
1
later US patent cites this one
That is below the median of utility patents granted in 2023 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.