US2989123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire extinguishing foam proportioning system
Assignee: National Foam System Inc
•
Filing: 1959-05-08
•
Granted: 1961-06-20
•
Expires: 1979-05-08
Abstract
No abstract record available.
Inventors
- 👤 Edward C Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:44
CPC Classifications
A; A62; A62C; A62C5/00; A62C5/002; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87652; Y10T137/8766
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1055063A
Cited
US1926413A
Cited
US2013113A
Cited
US2630820A
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US2799352A
Cited
US2862387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |