Patent US2693240A successfully refreshed from Google Patents.
US2693240A
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US
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Method and apparatus for preventing explosions and extinguishing fires
Assignee: Graviner Manufacturing Co Ltd
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Filing: 1949-01-31
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Granted: 1954-11-02
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Expires: 1969-01-31
Abstract
No abstract record available.
Inventors
- 👤 Gerald William
- 👤 Maclennan Alexander Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:53
CPC Classifications
A; A62; A62C; A62C99/00; A62C99/009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1022368A
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US1143970A
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US1182000A
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US1453091A
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US1708869A
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US1941700A
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US2385825A
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US2425778A
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US2450569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |