Patent US4070667A successfully refreshed from Google Patents.
Patent US2935248A successfully refreshed from Google Patents.
US2935248A
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US
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Compressor valve arrangement
Assignee: Carrier Corp
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Filing: 1957-10-03
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Granted: 1960-05-03
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Expires: 1977-10-03
Abstract
No abstract record available.
Inventors
- 👤 Karl M Gerteis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:58
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/10; F04B39/1073; F04B39/1086; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7559; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/784
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1476794A
Cited
US1996762A
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US2036799A
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US2247449A
Cited
DE741752C
Cited
US2433302A
Cited
DE866712C
Cited
US2757819A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |