Patent US2780899A successfully refreshed from Google Patents.
US2780899A
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US
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Apparatus for filling a fire extinguisher
Assignee: Process Engineering Inc
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Filing: 1951-12-19
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Granted: 1957-02-12
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Expires: 1971-12-19
Abstract
No abstract record available.
Inventors
- 👤 Walter L Benson
- 👤 Oscar L Larkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:12
CPC Classifications
A; A62; A62C; A62C13/00; A62C13/003; B; B65; B65B; B65B31/00; B65B31/04; B65B31/044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1629174A
Cited
US1790787A
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US1339431A
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US2180231A
Cited
US2521526A
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US2482778A
Cited
US2671590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-12 | 1960-08-13 | 1961-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-12 | 1964-08-13 | 1965-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-12 | 1968-08-13 | 1969-02-12 | $7700.00 | Window Closed / Lapsed |