US3202212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer element
Assignee: Peerless of America Inc
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Filing: 1963-07-29
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Granted: 1965-08-24
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Expires: 1983-07-29
Abstract
No abstract record available.
Inventors
- 👤 Richard W Kritzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:08
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; B; B21; B21J; B21J5/00; B21J5/06; B21J5/068; F28F1/124; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A HEAT TRANSFER ELEMENT COMPRISING, (A) A TUBULAR MEMBER HAVING AN ELONGATED WALL, (B) A PLURALITY OF OUTWARDLY PROJECTING RIBS EXTENDING LONGITUDINALLY OF SAID WALL IN LATERALLY SPACEDAPART RELATION, AND (C) A SERIES OF SPINES PROJECTING OUTWARDLY FROM SAID RIBS, SAID SPINES (1) HAVING BASE PORTIONS INTEGRAL WITH SAID RIBS, (2) BEING CLOSELY SPACED APART ALONG THE LENGTH OF SAID RIBS, AND (3) HAVNG AN ELONGATED, SUBSTANTIALLY RECTANGULAR CROSS-SECTION DISPOSED TRANSVERSELY TO THE LENGTH OF SAID RIBS AND WHICH CROSS-SECTION TERMINATES AT THE OUTER ENDS OF SAID PINES IN A THIN EDGE PORTION, (4) THEREBY PROVIDING A RELATIVELY HIGH RATIO OF EXPOSED SURFACE TO THE MASS, FOR HIGH EFFICIENCY IN HEAT TRANSFER.
Claim 2
Dependent Claim
112 words
A HEAT TRANSFER ELEMENT COMPRISING, (A) A TUBULAR MEMBER HAVING AN ELONGATED WALL, (B) A PLURALITY OF OUTWARDLY PROJECTING RIBS EXTENDING LONGITUDINALLY OF SAID WALL IN LATERALLY SPACEDAPART RELATION, AND (C) A SERIES OF SPINES PROJECTING OUTWARDLY FROM SAID RIBS, SAID SPINES (1) HAVING BASE PORTIONS INTEGRAL WITH SAID RIBS, (2) BEING CLOSELY SPACED APART ALONG THE LENGTH OF SAID RIBS, AND (3) HAVNG AN ELONGATED, SUBSTANTIALLY RECTANGULAR CROSS-SECTION DISPOSED TRANSVERSELY TO THE LENGTH OF SAID RIBS AND WHICH CROSS-SECTION TERMINATES AT THE OUTER ENDS OF SAID PINES IN A THIN EDGE PORTION, (4) THEREBY PROVIDING A RELATIVELY HIGH RATIO OF EXPOSED SURFACE TO THE MASS, FOR HIGH EFFICIENCY IN HEAT TRANSFER.
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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |