US
Willow oak tree named ‘QPSTB’
US PP18,321 Term endedTerm ended Jun 3, 2024 · From the USPTO record
Named at grant Tree Introductions, Inc. · find this owner
Filed Dec 15, 2005 as application 11/305,255 · Granted Dec 18, 2007
Base term plus 93 days of patent term adjustment (USPTO delay)
Today
Term ended Jun 3, 2024
2004
2026
Clock starts
Mar 2, 2004
Mar 2, 2004
Term ended
Jun 3, 2024
Jun 3, 2024
Granted
Dec 18, 2007
Dec 18, 2007
base term
patent term adjustment
after the term ends
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
93
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
20 years from filing
Base term
No maintenance fees are payable on this kind of patent.
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, 2004, when the earliest non-provisional application in its chain was filed (this one was filed Dec 15, 2005); a parent in its chain could not be resolved (the next row) | Mar 2, 2024 | 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 | +93 days, USPTO patent term adjustment record | Jun 3, 2024 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Computed term end | The steps above, in order | Jun 3, 2024 | From the USPTO record |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center
No maintenance fees are payable on this kind of patent, so the record carries no fee events.
Not on this page: the patent's family, its recorded assignments and its citation count. USPTO's assignment records, linked above, list every recorded assignment.
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.