US3475333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire extinguishing
Assignee: Enterra Corp
•
Filing: 1967-11-01
•
Granted: 1969-10-28
•
Expires: 1987-11-01
Abstract
No abstract record available.
Inventors
- 👤 Donald N Meldrum
- 👤 John R Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:38
CPC Classifications
A; A62; A62C; A62C3/00; A62C3/06; A62D; A62D1/00; A62D1/0071; A62D1/0078; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05; Y10S516/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB568811A
Cited
US3258423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |