US2709897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve responsive to condenser pressure for controlling water supply to condenser in reversible cooling and heating system
Assignee: Individual
•
Filing: 1954-05-03
•
Granted: 1955-06-07
•
Expires: 1974-05-03
Abstract
No abstract record available.
Inventors
- 👤 Clifford V Millikan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:40
CPC Classifications
F; F25; F25B; F25B13/00; F25B49/00; F25B49/02; F25B49/027; F25B2339/00; F25B2339/04; F25B2339/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2066161A
Cited
US2318161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-06 | 1958-12-06 | 1959-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-06 | 1962-12-06 | 1963-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-06 | 1966-12-06 | 1967-06-07 | $7700.00 | Window Closed / Lapsed |