Patent US3494137A successfully refreshed from Google Patents.
US3494137A
Expired / Lapsed
US
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Fluid-operated pump and refrigerant system containing the same
Assignee: GEORGE K CARGO
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Filing: 1968-06-12
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Granted: 1970-02-10
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Expires: 1988-06-12
Abstract
No abstract record available.
Inventors
- 👤 George K Cargo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:53
CPC Classifications
F; F25; F25B; F25B41/00; F25B31/00; F25B31/002; F25B31/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1060594A
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US1157491A
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US1544916A
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US2366955A
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US2665557A
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US3081604A
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US3079763A
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US3274796A
Cited
US3283532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |