Enter a patent or application number, get the term and the reasoning
The same steps run on every number. What changes is how much of the record supports them.
Three real answers
Live records from the database, not examples. A clean answer, one where a terminal disclaimer is present but unresolvable, and a pending application that gets no date.
Term ends Feb 28, 2028 · High confidence
Today
2007
2028
base termadjustmentunresolvedUpdated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts May 17, 2007, when this application, 11/749,869, was filed | May 17, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +287 days, USPTO patent term adjustment record | Feb 28, 2028 | 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Feb 28, 2028 | High confidence |
Term ends no later than Dec 21, 2032 · Medium confidence
A disclaimer cap could land anywhere in here
Today
2012
2032
base termadjustmentunresolvedUpdated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Dec 21, 2012, when this application, 13/724,526, was filed | Dec 21, 2032 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | no later than Dec 21, 2032 | Medium confidence |
Topical Compositions
17/504,132
PendingTerm is not computable until grant, so no date is shown and no estimate is implied.
Nothing computed for a pending application · how we know
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What the tiers mean
High. every input resolved from the record.
Medium. one input unresolved (a parent application we could not resolve counts as one); the date carries a note saying which.
Low. two or more caveats on the record, on one input or several.
A confidence tier describes how complete a calculation's inputs are. It is not a legal opinion or a probability that the date is correct.
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
Each kind of patent takes its own rule: 20 years from filing for a utility or plant patent (17 from grant where it was filed before June 8, 1995, if that is later), 14 or 15 years from grant for a design patent. A number this site holds no record for gets no date.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.