US2869330A
Expired / Lapsed
US
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Means and method for controlling high side pressure in heat transfer systems of the compression type
Assignee: MERCER ENGINEERING Co
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Filing: 1955-03-08
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Granted: 1959-01-20
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Expires: 1975-03-08
Abstract
No abstract record available.
Inventors
- 👤 Daniel E Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:21
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F25B49/027; F25B2400/00; F25B2400/04; F25B2400/0403; Y; Y10; Y10S; Y10S62/00; Y10S62/17
Claims Analysis
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |