Collateral for a security interest recorded May 27, 2026 (Igf Business Credit Limited).
Term ends no later than Jan 6, 2040 · Medium confidence
20-year base term ends Jan 17, 2039
In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.
Held by Portable Multimedia Ltd.
Filed Feb 24, 2021 as application 17/184,051 · Granted Dec 26, 2023
Base term plus 354 days of patent term adjustment (USPTO delay)
Today
2019
2040
Clock starts
Jan 17, 2019
Jan 17, 2019
Ends no later than
Jan 6, 2040
Jan 6, 2040
Granted
Dec 26, 2023
Dec 26, 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
354
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
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.
9
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 354 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. 0 of 3 maintenance fees are paid so far. Confidence: Medium. 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 Jan 17, 2019, when application 16/250,260, the earliest non-provisional in its chain, was filed (this one was filed Feb 24, 2021) | Jan 17, 2039 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +354 days, USPTO patent term adjustment record | Jan 6, 2040 | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium 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 | no later than Jan 6, 2040 | Medium confidence |
This family
| US 11,009,776 | In force Jun 2039 | Jun 2039 |
| Application 16/263,348 | Abandoned not computed | not computed |
| US 11,142,135 | In force May 2039 | May 2039 |
| US 11,061,555 | Lapsed on the fee record Jul 2025 | Jul 2025 |
| US 10,703,302 | In force Jan 2039 | Jan 2039 |
| US 11,852,956 | this patent no later than Jan 2040 | no later than Jan 2040 |
| US 11,414,027 | In force Jan 2039 | Jan 2039 |
| Application 18/150,536 | Abandoned not computed | not computed |
8 of 9 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 |
|---|---|---|---|
| Feb 25, 2021 Reel 55405, frame 189 | Grant, Robert George; Lambert, Graham Keith | Portable Multimedia Ltd. | Assignment of Assignor's Interest |
| May 27, 2026 Reel 75653, frame 536 | Portable Multimedia Limited | Igf Business Credit Limited | 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
Jan 2040
Term ends no later than Jan 6, 2040. Maintenance fees still fall due before then
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Note
The 354 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Jan 6, 2040. We will not guess the cap.
Citations
0
later US patents cite 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
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. 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.