US2724246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for improving the utilization of volatile refrigerants in heat exchangers
Assignee: Individual
•
Filing: 1954-04-01
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Granted: 1955-11-22
•
Expires: 1974-04-01
Abstract
No abstract record available.
Inventors
- 👤 Charles E Lowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:47
CPC Classifications
F; F25; F25B; F25B39/00; F25B39/02; F25B39/022; F25B13/00; F25B41/00; F25B2339/00; F25B2339/04; F25B2339/041; F25B2341/00; F25B2341/001; F25B2341/0012; F25B2341/0015; F25B2500/00; F25B2500/01; F25B2500/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2123021A
Cited
US2132932A
Cited
US2117506A
Cited
US2159251A
Cited
US2381589A
Cited
US2297681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |