US2760587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire-extinguishing apparatus
Assignee: Process Engineering Inc
•
Filing: 1951-12-13
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Granted: 1956-08-28
•
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
2026-10-31 11:21
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; A; A62; A62C; A62C13/00; A62C13/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1968825A
Cited
US1919149A
Cited
US2109966A
Cited
US2519967A
Cited
US2548750A
Cited
US2586088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |