Material for vacuum device, vacuum device, vacuum apparatus, manufacturing method of material for vacuum device, processing method of vacuum device, and processing method of vacuum apparatus
US 7,297,419 Lapsed on the fee recordLapsed Nov 20, 2019 on the fee record · From the USPTO record
20-year base term ended Jun 8, 2024
Third maintenance fee unpaid; grace period ended.
Jun 8, 2004
Nov 20, 2019
Nov 20, 2007
Jun 19, 2025
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Jun 8, 2004, when this application, 10/862,358, was filed | Jun 8, 2024 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +376 days, USPTO patent term adjustment record | Jun 19, 2025 | 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 | 2 of 3 maintenance fees paid | lapsed Nov 20, 2019 | High confidence |
| Computed term end | The steps above, in order | Nov 20, 2019 | 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.