Patent US2687745A successfully refreshed from Google Patents.
US2687745A
Expired / Lapsed
US
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Safety shutoff valve for fluid pipe lines
Assignee: Individual
•
Filing: 1950-03-22
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Granted: 1954-08-31
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Expires: 1970-03-22
Abstract
No abstract record available.
Inventors
- 👤 Hackett Norman Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:11
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/20; F16K17/22; F16K17/24; F16K17/28; F16K17/285; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7726; Y10T137/7727
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US756624A
Cited
US1767201A
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US1845139A
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US2040580A
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US2055182A
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US1983791A
Cited
FR757593A
Cited
US2127849A
Cited
US2361963A
Cited
US2466441A
Cited
US2465606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |