US3387463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration apparatus with defrost means
Assignee: Whirlpool Corp
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Filing: 1966-09-01
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Granted: 1968-06-11
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Expires: 1986-09-01
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Frohbieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:41
CPC Classifications
F; F25; F25D; F25D21/00; F25D21/02; F25D21/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A REFRIGERATION APPARATUS; MEANS FOR CHILLING AIR; CABINET MEANS DEFINING A COMPARTMENT TO BE REFRIGERATED; DUCT MEANS HAVING A VENTURI PORTION AND AN OUTLET OPEN ING INTO SAID COMPARTMENT FOR CONDUCTING CHILLED AIR FROM SAID CHILLING MEANS THROUGH SAID OUTLET INTO SAID COMPARTMENT; AIR TRANSLATION MEANS UPSTREAM OF SAID OUTLET FOR FLOWING CHILLED AIR FROM SAID CHILLING MEANS THROUGH SAID DUCT MEANS INTO SAID COMPARTMENT; AND MEANS DEFINING A PASSAGE BETWEEN SAID COMPARTMENT AND SAID DUCT MEANS VENTURI PORTION AND DOWNSTREAM OF SAID AIR TRANSLATION MEANS FOR PERMITTING AIR FLOWING THROUGH SAID DUCT MEANS AND OUTLET TO DRAW AIR BY VENTURI ACTION FROM SAID COMPARTMENT INTO SAID DUCT MEANS TO MIX WITH SAID CHILLED AIR THEREIN FOR SUBSEQUENT DISCHARGE OF THE MIXED AIR THROUGH SAID OUTLET INTO SAID COMPARTMENT.
Claim 2
Dependent Claim
130 words
IN A REFRIGERATION APPARATUS; MEANS FOR CHILLING AIR; CABINET MEANS DEFINING A COMPARTMENT TO BE REFRIGERATED; DUCT MEANS HAVING A VENTURI PORTION AND AN OUTLET OPEN ING INTO SAID COMPARTMENT FOR CONDUCTING CHILLED AIR FROM SAID CHILLING MEANS THROUGH SAID OUTLET INTO SAID COMPARTMENT; AIR TRANSLATION MEANS UPSTREAM OF SAID OUTLET FOR FLOWING CHILLED AIR FROM SAID CHILLING MEANS THROUGH SAID DUCT MEANS INTO SAID COMPARTMENT; AND MEANS DEFINING A PASSAGE BETWEEN SAID COMPARTMENT AND SAID DUCT MEANS VENTURI PORTION AND DOWNSTREAM OF SAID AIR TRANSLATION MEANS FOR PERMITTING AIR FLOWING THROUGH SAID DUCT MEANS AND OUTLET TO DRAW AIR BY VENTURI ACTION FROM SAID COMPARTMENT INTO SAID DUCT MEANS TO MIX WITH SAID CHILLED AIR THEREIN FOR SUBSEQUENT DISCHARGE OF THE MIXED AIR THROUGH SAID OUTLET INTO SAID COMPARTMENT.
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) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |