Term ended Dec 23, 2021 · Medium confidence
20-year base term ended Mar 2, 2021
Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 8,594,188), so the cap could be lower.
Filed Dec 10, 2013 as application 14/101,759 · Granted Apr 16, 2019
Base term plus 828 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
Term ended Dec 23, 2021
2001
2026
Clock starts
Mar 2, 2001
Mar 2, 2001
Term ended
Dec 23, 2021
Dec 23, 2021
Granted
Apr 16, 2019
Apr 16, 2019
base term
patent term adjustment
after the term ends
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
828
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 8,594,188.
1 of 1
Maintenance fees paid
One maintenance fee can end this term early, the one due 3.5 years from grant; the next one's grace period runs past the term end. This counts it if the record shows it paid.
7
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 828 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 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 Mar 2, 2001, when application 09/798,346, the earliest non-provisional in its chain, was filed (this one was filed Dec 10, 2013) | Mar 2, 2021 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +828 days, USPTO patent term adjustment record | Jun 8, 2023 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,594,188) | capped to Dec 23, 2021 | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 1 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | Dec 23, 2021 | Medium confidence |
This family
| US 8,374,237 | In force May 2031 | May 2031 |
| US 8,576,907 | Term ended no later than Dec 2021 | no later than Dec 2021 |
| US 8,594,188 | Term ended no later than Dec 2021 | no later than Dec 2021 |
| US 8,488,670 | Term ended Mar 2021 | Mar 2021 |
| US 9,667,957 | Term ended Mar 2021 | Mar 2021 |
| US 10,264,256 | this patent Dec 2021 | Dec 2021 |
| Application 16/364,011 | 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 |
|---|---|---|---|
| Dec 10, 2013 Reel 31751, frame 92 | Demos, Gary A.; Ruhoff, David | Demografx | Assignment of Assignor's Interest |
| Dec 10, 2013 Reel 31751, frame 304 | Demografx | Dolby Laboratories, Inc. | Assignment of Assignor's Interest |
| Dec 10, 2013 Reel 31751, frame 428 | Dolby Laboratories, Inc. | Dolby Laboratories Licensing Corporation | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Note
The 828 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 8,594,188.
Citations
4
later US patents cite this one
That is above the median of utility patents granted in 2019 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.