Patent US2647534A successfully refreshed from Google Patents.
US2647534A
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Pressure relief valve applicable to fuel gas mains
Assignee: Honeywell International Inc
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Filing: 1949-10-12
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Granted: 1953-08-04
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Expires: 1969-10-12
Abstract
No abstract record available.
Inventors
- 👤 Benjamin A Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:28
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/0446; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7898; Y10T137/7901; Y10T137/7902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US452882A
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US802915A
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US1449646A
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US1411018A
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GB439602A
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US2213181A
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US2264655A
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US2308347A
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US2505413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |