Patent US2651317A successfully refreshed from Google Patents.
US2651317A
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Pressure modulating relay
Assignee: PENN IND INSTR CORP
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Filing: 1944-10-30
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Granted: 1953-09-08
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Expires: 1964-10-30
Abstract
No abstract record available.
Inventors
- 👤 Winfield B Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:28
CPC Classifications
F; F15; F15C; F15C4/00; G; G05; G05B; G05B11/00; G05B11/44; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2365; Y10T137/2409; Y10T137/2452
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2016824A
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GB421815A
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US2117800A
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US2248322A
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US2290987A
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US2441405A
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US2354423A
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US2356970A
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US2360889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |