Patent US3570263A successfully refreshed from Google Patents.
US3570263A
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Thermal expansion valve with feedback for stabilizing a refrigeration system
Assignee: Honeywell Inc
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Filing: 1969-04-28
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Granted: 1971-03-16
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Expires: 1989-04-28
Abstract
Abstract A THERMAL EXPANSION VALVE FOR A REFRIGERATION SYSTEM HAVING A TEMPERATURE BULB FOR RESPONDING TO SUPERHEAT AND AN EXTERNAL EQUALIZER WITH MEANS ASSOCIATED WITH THE TEMPERATURE AND PRESSURE RESPONSIVE PORTIONS OF THE ACTUATOR VALVE FOR TEMPORARILY OFFSETTING SOME OF THE EFFECT OF THE SUPERHEAT UPON A CHANGE IN EVAPORATOR PRESSURE TO STABILIZE THE REFRIGERATION SYSTEM.
Inventors
- 👤 James R Tobias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:14
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/30; F25B41/31; F25B41/33; F25B41/335; F25B2600/00; F25B2600/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |