US2684579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cooling oil of refrigerant compressors
Assignee: HIEATT ENGINEERING Co
•
Filing: 1951-06-04
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Granted: 1954-07-27
•
Expires: 1971-06-04
Abstract
No abstract record available.
Inventors
- 👤 Forrest H Hieatt
- 👤 William L Holladay
- 👤 George L Gelineau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:16
CPC Classifications
F; F25; F25B; F25B31/00; F25B31/002; F25B2400/00; F25B2400/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2042394A
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US2178100A
Cited
US2246244A
Cited
US2322874A
Cited
US2391200A
Cited
US2424010A
Cited
US2418962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |