US3254707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger and cooling apparatus
Assignee: Hunt Foods and Industries Inc
•
Filing: 1964-03-19
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Granted: 1966-06-07
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Expires: 1984-03-19
Abstract
No abstract record available.
Inventors
- 👤 Kenneth F Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:24
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0231; Y; Y10; Y10S; Y10S165/00; Y10S165/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN COMBINATION: (A) A HEAT EXCHANGER HAVING SPACED HEADERS WHICH EXTEND TRANSVERSELY OF SAID HEAT EXCHANGER; (B) INLET AND OUTLET DUCTS WHICH ARE DISPOSED IN SAD HEADERS, RESPECTIVELY, AND WHICH EXTEND TRANSVERSELY OF SAID HEAT EXCHANGER THEREIN; (C) EACH OF SAID DUCTS BEING OF STEPPED CONSTRUCTION TRANSVERSELY OF SAID HEAT EXCHANGER AND DECREASING UNIFORMLY IN AREA STEP BY STEP FROM ONE SIDE OF SAID HEAT EXCHANGER TO THE OTHER; AND (D) EACH OF SAID DUCTS HAVING OPENINGS OF UNIFORM SIZE AT THE ENDS OF THE RESPECTIVE STEPS THEREIN AND FACING IN THE SAME DIECTIONS.
Claim 2
Dependent Claim
94 words
IN COMBINATION: (A) A HEAT EXCHANGER HAVING SPACED HEADERS WHICH EXTEND TRANSVERSELY OF SAID HEAT EXCHANGER; (B) INLET AND OUTLET DUCTS WHICH ARE DISPOSED IN SAD HEADERS, RESPECTIVELY, AND WHICH EXTEND TRANSVERSELY OF SAID HEAT EXCHANGER THEREIN; (C) EACH OF SAID DUCTS BEING OF STEPPED CONSTRUCTION TRANSVERSELY OF SAID HEAT EXCHANGER AND DECREASING UNIFORMLY IN AREA STEP BY STEP FROM ONE SIDE OF SAID HEAT EXCHANGER TO THE OTHER; AND (D) EACH OF SAID DUCTS HAVING OPENINGS OF UNIFORM SIZE AT THE ENDS OF THE RESPECTIVE STEPS THEREIN AND FACING IN THE SAME DIECTIONS.
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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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |