Collateral for a security interest recorded May 27, 2026 (Igf Business Credit Limited).
Term ends May 22, 2039 · High confidence
20-year base term ends Jan 31, 2039
Held by Portable Multimedia Ltd.
Filed Jan 31, 2019 as application 16/263,383 · Granted Oct 12, 2021
Base term plus 111 days of patent term adjustment (USPTO delay)
Today
2019
2039
Clock starts
Jan 31, 2019
Jan 31, 2019
Term ends
May 22, 2039
May 22, 2039
Granted
Oct 12, 2021
Oct 12, 2021
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
111
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.
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 111 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 Jan 31, 2019, when this application, 16/263,383, was filed | Jan 31, 2039 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +111 days, USPTO patent term adjustment record | May 22, 2039 | 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 | May 22, 2039 | High 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 | this patent 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 | In force 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 |
|---|---|---|---|
| May 29, 2019 Reel 49306, frame 803 | Grant, Robert George; Lambert, Graham Keith; Hill, Ceri | 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
May 2039
Term ends May 22, 2039. Maintenance fees still fall due before then
Note
The 111 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
14
later US patents cite this one
That is top 25% 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.