US2809374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aviators' helmets
Assignee: American Optical Corp
•
Filing: 1952-11-07
•
Granted: 1957-10-15
•
Expires: 1972-11-07
Abstract
No abstract record available.
Inventors
- 👤 Wesley B Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:18
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US427263A
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US1456524A
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US1606531A
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US1947137A
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US2108256A
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US2300912A
Cited
US2587958A
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US2448021A
Cited
US2642574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |