US2898908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field protective mask
Assignee: Individual
•
Filing: 1954-04-06
•
Granted: 1959-08-11
•
Expires: 1974-04-06
Abstract
No abstract record available.
Inventors
- 👤 Sovinsky Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:28
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR31977E
Cited
US1975797A
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US1966553A
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US2038071A
Cited
US2671528A
Cited
US2466127A
Cited
US2591953A
Cited
US2534720A
Cited
US2775967A
Cited
US2684066A
Cited
US2671445A
Cited
US2665686A
Cited
US2744524A
Cited
US2751904A
Cited
US2811967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |