Term ends Apr 18, 2028 · Medium confidence
20-year base term ends Apr 18, 2028
Why Medium: A parent in the chain could not be resolved.
Held by Roger P. Jackson
Filed Mar 28, 2023 as application 18/191,176 · Granted Jan 16, 2024
Base term, 20 years from filing
Today
2008
2028
Clock starts
Apr 18, 2008
Apr 18, 2008
Term ends
Apr 18, 2028
Apr 18, 2028
Granted
Jan 16, 2024
Jan 16, 2024
base term
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
None
Term adjustment
No prosecution delay on this record.
None
Terminal disclaimer
No disclaimer on this record.
0 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.
329
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 is its 20-year base term, with no adjustment for prosecution delay. 0 of 1 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 Apr 18, 2008, when the earliest non-provisional application in its chain was filed (this one was filed Mar 28, 2023); a parent in its chain could not be resolved (the next row) | Apr 18, 2028 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | None on file | no change | 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 1 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Apr 18, 2028 | Medium confidence |
This family
| US 6,716,214 | Term ended Jun 2023 | Jun 2023 |
| US 8,137,386 | In force Apr 2028 | Apr 2028 |
| US 7,160,300 | Term ended Feb 2024 | Feb 2024 |
| US 7,470,279 | Term ended Apr 2025 | Apr 2025 |
| Application PCT/US2004/010447 | PCT application no patent term | no patent term |
| US 7,662,175 | Term ended Jan 2024 | Jan 2024 |
| US 8,052,724 | Lapsed on the fee record Nov 2023 | Nov 2023 |
| Application PCT/US2004/031860 | PCT application no patent term | no patent term |
8 of 329 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
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
Apr 2028
Term ends Apr 18, 2028. Maintenance fees still fall due before then
Citations
0
later US patents cite this one
Fewer than half of the utility patents granted in 2024 in our data have been cited yet, so we show the count and do not rank on it.
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.