US3494639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fitting for fire extinguishing systems
Assignee: Factory Mutual Research Corp
•
Filing: 1968-06-21
•
Granted: 1970-02-10
•
Expires: 1988-06-21
Abstract
No abstract record available.
Inventors
- 👤 James B Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:29
CPC Classifications
A; A62; A62C; A62C35/00; A62C35/58; A62C35/60; A62C35/605; F; F16; F16L; F16L37/00; F16L37/08; F16L37/084; F16L37/092; Y; Y10; Y10S; Y10S277/00; Y10S277/931; Y10S277/933; Y10T; Y10T403/00; Y10T403/57; Y10T403/5793; Y10T403/70; Y10T403/7047; Y10T403/7051; Y10T403/7052
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US643802A
Cited
US870428A
Cited
US1508026A
Cited
GB310452A
Cited
US2226304A
Cited
US2283975A
Cited
DE858164C
Cited
US2710630A
Cited
US2880019A
Cited
US3027179A
Cited
US3169025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |