US2825424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas mask canisters
Assignee: Individual
•
Filing: 1950-12-22
•
Granted: 1958-03-04
•
Expires: 1970-12-22
Abstract
No abstract record available.
Inventors
- 👤 William E Gross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:11
CPC Classifications
A; A62; A62B; A62B19/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1781254A
Cited
US1789262A
Cited
US1963874A
Cited
US2008677A
Cited
US2104016A
Cited
US2112213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |