US3349840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid flow control apparatus
Assignee: Whirlpool Corp
•
Filing: 1965-04-05
•
Granted: 1967-10-31
•
Expires: 1985-04-05
Abstract
No abstract record available.
Inventors
- 👤 Paul H Tope
- 👤 Alexander L Reiter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:44
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/20; F25B41/22; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8242
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
APPARATUS FOR MAINTAINING A CHAMBER AT A PRESELECTED TEMPERATURE, COMPRISING: AN EVAPORATOR IN HEAT TRANSFER ASSOCIATION WITH SAID CHAMBER; MEANS FOR CIRCULATING REFRIGERANT FLUID TO SAID EVAPORATOR FOR EFFECTING REFRIGERATION THEREOF; VALVE MEANS FOR VARYING THE RATE OF FLOW OF REFRIGERANT FLUID THROUGH SAID CIRCULATING MEANS FOR CONTROLLING SAID REFRIGERATION; MEANS FOR PROVIDING HEAT TO SAID CHAMBER; AND MEANS FOR SELECTIVELY CONTROLLING SAID VALVE MEANS AND SAID HEAT MEANS FOR MAINTAINING A PRESELECTED TEMPERATURE OF SAID CHAMBER, SAID CONTROLLING MEANS CONCURRENTLY INVERSELY PROPORTIONATELY VARYING THE RATE OF FLOW OF REFRIGERANT AND THE RATE OF HEAT PROVIDED BY SAID HEAT MEANS WHEN THE TEMPERATURE IN SAID CHAMBER IS IN A RELATIVELY HIGH RANGE, AND CAUSING
Claim 2
Dependent Claim
114 words
APPARATUS FOR MAINTAINING A CHAMBER AT A PRESELECTED TEMPERATURE, COMPRISING: AN EVAPORATOR IN HEAT TRANSFER ASSOCIATION WITH SAID CHAMBER; MEANS FOR CIRCULATING REFRIGERANT FLUID TO SAID EVAPORATOR FOR EFFECTING REFRIGERATION THEREOF; VALVE MEANS FOR VARYING THE RATE OF FLOW OF REFRIGERANT FLUID THROUGH SAID CIRCULATING MEANS FOR CONTROLLING SAID REFRIGERATION; MEANS FOR PROVIDING HEAT TO SAID CHAMBER; AND MEANS FOR SELECTIVELY CONTROLLING SAID VALVE MEANS AND SAID HEAT MEANS FOR MAINTAINING A PRESELECTED TEMPERATURE OF SAID CHAMBER, SAID CONTROLLING MEANS CONCURRENTLY INVERSELY PROPORTIONATELY VARYING THE RATE OF FLOW OF REFRIGERANT AND THE RATE OF HEAT PROVIDED BY SAID HEAT MEANS WHEN THE TEMPERATURE IN SAID CHAMBER IS IN A RELATIVELY HIGH RANGE, AND CAUSING
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |