Patent US2859912A successfully refreshed from Google Patents.
US2859912A
Expired / Lapsed
US
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Crescent shaped reed valve
Assignee: Carrier Corp
•
Filing: 1953-04-23
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Granted: 1958-11-11
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Expires: 1973-04-23
Abstract
No abstract record available.
Inventors
- 👤 Richard H Swart
- 👤 Robert W Ayling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:43
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/10; F04B39/1073; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7859; Y10T137/7898
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US986122A
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US1273698A
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US1633772A
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US2001885A
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US2005959A
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US2195292A
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US2565950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |