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US2778435A
Expired / Lapsed
US
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Safety device for fire-extinguishing apparatus
Assignee: Ansul Chemical Co
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Filing: 1955-10-25
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Granted: 1957-01-22
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Expires: 1975-10-25
Abstract
No abstract record available.
Inventors
- 👤 Roy E Downham
- 👤 Alden W Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:44
CPC Classifications
A; A62; A62C; A62C13/00; A62C13/62; A62C13/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2558409A
Cited
US2586088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |