Patent US2956728A successfully refreshed from Google Patents.
US2956728A
Expired / Lapsed
US
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Relief and drain valve for compressors
Assignee: Skinner Chuck Co
•
Filing: 1955-09-28
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Granted: 1960-10-18
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Expires: 1975-09-28
Abstract
No abstract record available.
Inventors
- 👤 George A Goepfrich
- 👤 Padula Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:08
CPC Classifications
F; F16; F16K; F16K24/00; F16K24/04; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2642; Y10T137/2931; Y10T137/3003; Y10T137/3102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2537224A
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US2700397A
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US2739605A
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US2799293A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |