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US 8,681,992 Lapsed on the fee recordLapsed Mar 25, 2018 on the fee record · From the USPTO record
20-year base term ends Sep 13, 2032
First maintenance fee unpaid; grace period ended.
Sep 13, 2012
Mar 25, 2018
Mar 25, 2014
Sep 13, 2032
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Sep 13, 2012, when the earliest non-provisional application in its chain was filed (this one was filed Dec 17, 2012); a parent in its chain could not be resolved (the next row) | Sep 13, 2032 | 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 | 0 of 3 maintenance fees paid | lapsed Mar 25, 2018 | High confidence |
| Computed term end | The steps above, in order | Mar 25, 2018 | 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.