US2897659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for gas and liquid cooling in compressor plants with two- or multistage cooling circuit
Assignee: CKD STALINGRAD NARODNI PODNIK
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Filing: 1955-08-04
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Granted: 1959-08-04
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Expires: 1975-08-04
Abstract
No abstract record available.
Inventors
- 👤 Wergner Frantisek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:00
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/04; F25B1/053; F25B2400/00; F25B2400/13; F25B2400/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1280101A
Cited
US2164761A
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US2277647A
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US2274391A
Cited
US2386198A
Cited
US2388556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |