Device for hardening the teeth of gear wheels by individual inductive heat treatment for each tooth, using several inductors
US 8,766,150 Lapsed on the fee recordLapsed Jul 1, 2022 on the fee record · From the USPTO record
20-year base term ends Aug 10, 2029
Second maintenance fee unpaid; grace period ended.
Aug 10, 2009
Jul 1, 2022
Jul 1, 2014
Jan 25, 2031
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Aug 10, 2009, when this application, 13/058,632, was filed | Aug 10, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +533 days, USPTO patent term adjustment record | Jan 25, 2031 | 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 | 1 of 3 maintenance fees paid | lapsed Jul 1, 2022 | High confidence |
| Computed term end | The steps above, in order | Jul 1, 2022 | 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.