Bicubic surface real time tesselation unit
US 7,532,213 Surrendered on reissueSurrendered on reissue Jul 12, 2011 · From the USPTO record
20-year base term ended Dec 11, 2020
Surrendered on reissue Jul 12, 2011 · its term and maintenance fees continue in US RE42,534.
Dec 11, 2000
Jul 12, 2011
May 12, 2009
Dec 11, 2020
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Dec 11, 2000, when the earliest non-provisional application in its chain was filed (this one was filed Jul 16, 2007); a parent in its chain could not be resolved (the next row) | Dec 11, 2020 | 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 | 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 | No fee events in USPTO's record of this patent. A gap in the record, not evidence of lapse | no change | Medium confidence |
| Reissue | US RE42,534 issued Jul 12, 2011, and this patent's term continues in it (35 U.S.C. 251, 252) | surrendered Jul 12, 2011 | High confidence |
| Surrendered on reissue | The steps above, in order | Jul 12, 2011 | 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
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. Related patents and pending applications may cover overlapping subject matter.