US2816290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic suspension for safety hat
Assignee: Spectrum Brands Inc
•
Filing: 1955-01-24
•
Granted: 1957-12-17
•
Expires: 1975-01-24
Abstract
No abstract record available.
Inventors
- 👤 Charles J Boyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:37
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/10; A42B3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US365577A
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US562817A
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US2025772A
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US2028060A
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US2398561A
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US2415214A
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US2597367A
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US2585937A
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US2597924A
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US2679046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |