US2784791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire-extinguishing apparatus
Assignee: Process Engineering Inc
•
Filing: 1951-12-13
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Granted: 1957-03-12
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Expires: 1971-12-13
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:53
CPC Classifications
A; A62; A62C; A62C13/00; A62C13/66; A62C13/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1919149A
Cited
US2004018A
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US2118597A
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US2129465A
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US2347010A
Cited
US2476748A
Cited
US2531123A
Cited
US2684180A
Cited
US2682967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |