Humanised antibodies
US 7,566,771 Surrendered on reissueSurrendered on reissue Oct 26, 2021 · From the USPTO record
20-year base term ended Jul 28, 2026
Surrendered on reissue Oct 26, 2021 · its term and maintenance fees continue in US RE48,787 and US RE50,178.
Sep 17, 1991
Oct 26, 2021
Jul 28, 2009
Jul 28, 2026
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, the 1995 transition rule | Granted Jul 28, 2009 + 17 years, or clock starts Sep 17, 1991 + 20 years, whichever is later; a parent in its chain could not be resolved (the next row) | Jul 28, 2026 | 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 | No term adjustment record on a grant after 2005, so none is added | no change | Medium 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 | no change | High confidence |
| Reissue | US RE48,787 and US RE50,178 issued Oct 26, 2021, and this patent's term continues in it (35 U.S.C. 251, 252) | surrendered Oct 26, 2021 | High confidence |
| Surrendered on reissue | The steps above, in order | Oct 26, 2021 | From the USPTO record |
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
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.