Patent US2649698A successfully refreshed from Google Patents.
US2649698A
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US
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Special valve arrangement on centrifugal condensers and coolers
Assignee: Carrier Corp
•
Filing: 1949-03-18
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Granted: 1953-08-25
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Expires: 1969-03-18
Abstract
No abstract record available.
Inventors
- 👤 Goldmann Philipp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:29
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/04; F25B1/053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1206605A
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US1378348A
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US1575818A
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US1535662A
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US1551029A
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US1634903A
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US1650872A
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US1989340A
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US2292259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |