Isolated Polypeptides and Polynucleotides Useful for Increasing Nitrogen Use Efficiency, Abiotic Stress Tolerance, Yield and Biomass in Plants
US 11,453,887 Lapsed on the fee recordLapsed Sep 27, 2026 on the fee record · High confidence
20-year base term ends Aug 18, 2029
First maintenance fee unpaid; grace period ended.
Aug 18, 2009
Sep 27, 2026
Sep 27, 2022
Aug 18, 2029
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Aug 18, 2009, when the earliest non-provisional application in its chain was filed (this one was filed Sep 21, 2020) | Aug 18, 2029 | 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 | 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 | lapsed Sep 27, 2026 | High confidence |
| Computed term end | The steps above, in order | Sep 27, 2026 | High confidence |
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.
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
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