Patent US3279535A successfully refreshed from Google Patents.
US3279535A
Expired / Lapsed
US
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Serpentine-shaped heat exchanger and process for its manufacture
Assignee: Individual
•
Filing: 1964-04-06
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Granted: 1966-10-18
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Expires: 1984-04-06
Abstract
No abstract record available.
Inventors
- 👤 Huet Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:01
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; B21C37/283; F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/14; F28F9/00; F28F9/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
HEAT EXCHANGER CONSISTING OF A SERPENTINE-SHAPED TUBE HAVING PARALLEL COPLANAR STRAIGHT PORTIONS INTERCONNECTED BY ELBOW-SHAPED PORTIONS, WHEREIN THE STRAIGHT AND ELBOW-SHAPED PORTIONS HAVE TWO DIAMETRICALLY OPPOSED LONGITUDINAL RIBS LOCATED WITHIN THE AXIAL PLANE OF THE SERPENTINE, THE ORIGINAL STRAIGHT RIBS HAVING THIN TRANSVERSE SLITS ON THE EXTRADOS-FORMING PORTIONS OF THE ELBOWS
Claim 2
Dependent Claim
51 words
HEAT EXCHANGER CONSISTING OF A SERPENTINE-SHAPED TUBE HAVING PARALLEL COPLANAR STRAIGHT PORTIONS INTERCONNECTED BY ELBOW-SHAPED PORTIONS, WHEREIN THE STRAIGHT AND ELBOW-SHAPED PORTIONS HAVE TWO DIAMETRICALLY OPPOSED LONGITUDINAL RIBS LOCATED WITHIN THE AXIAL PLANE OF THE SERPENTINE, THE ORIGINAL STRAIGHT RIBS HAVING THIN TRANSVERSE SLITS ON THE EXTRADOS-FORMING PORTIONS OF THE ELBOWS
References Cited (Backward Citations)
US3111168A
Cited
US2960114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |