Patent US3739197A successfully refreshed from Google Patents.
Patent US2872730A successfully refreshed from Google Patents.
US2872730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing finned tubing
Assignee: Marley Co LLC
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Filing: 1954-01-18
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Granted: 1959-02-10
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Expires: 1974-01-18
Abstract
No abstract record available.
Inventors
- 👤 Dougan L Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:17
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/19; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/22; B21C37/26; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/49382
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
A METHOD BRAZING AN ALUMINUM FIN TO A TUBE HAVING AN OUTER SURFACE OF COPPER COMPRISING THE STEPS OF INITIALLY COATION SAID OUT SURFACE OF THE TUBE WITH CADMIUM AND A FLUXING MATERIAL, SAID FLUXING MATERIAL BEING ADAPTED TO REMOVE INTERFERING FILMS AND OXIDES; APPLYING THE FIN TO THE TUBE WITH THE INNER EDGE SURFACE OF IN CLOSE ABUTTING RELATIONSHIP TO SAID OUTER SURFACE OF THE TUBE; AND HEATING THE FINNED TUBING TO A BRAZING TEMPERATURE ONLY, SAID TEMPERATURE BEING ABOVE THE MELTING POINT OF THE CADMIUM AND BELOW THE MELTING POINT OF THE FIN AND THE TUBE, SAID MATERIAL INCLUDING A METAL COMPOUND WHICH IS CAPABLE OF CHEMICALLY REACTING WITH THE FIN AT SAID TEMPERATURE TO PRODUCE AN INTERMEDIATE BRAZING METAL WHICH COMBINES WITH THE MOLTEN CADMIUM TO PRODUCE A BOND ALLOY, SAID BONDING ALLOY FLOWING INTO SAID BUTT JOINT BETWEEN THE INNER EDGE SURFACE OF THE FIN AND SAID OUTER SURFACE OF THE TUBE BY CAPILLARY ACTION AND UNITING WITH THE FIN AND THE TUBE TO THEREBY PRESENT, UPON COOLING OF THE COMPONENTS, A SOUND INTERCONNECTION OF HIGH HEAT CONDUCTIVITY BETWEEN THE FIN AND THE TUBE.
Claim 2
Independent Claim
188 words
A METHOD BRAZING AN ALUMINUM FIN TO A TUBE HAVING AN OUTER SURFACE OF COPPER COMPRISING THE STEPS OF INITIALLY COATION SAID OUT SURFACE OF THE TUBE WITH CADMIUM AND A FLUXING MATERIAL, SAID FLUXING MATERIAL BEING ADAPTED TO REMOVE INTERFERING FILMS AND OXIDES; APPLYING THE FIN TO THE TUBE WITH THE INNER EDGE SURFACE OF IN CLOSE ABUTTING RELATIONSHIP TO SAID OUTER SURFACE OF THE TUBE; AND HEATING THE FINNED TUBING TO A BRAZING TEMPERATURE ONLY, SAID TEMPERATURE BEING ABOVE THE MELTING POINT OF THE CADMIUM AND BELOW THE MELTING POINT OF THE FIN AND THE TUBE, SAID MATERIAL INCLUDING A METAL COMPOUND WHICH IS CAPABLE OF CHEMICALLY REACTING WITH THE FIN AT SAID TEMPERATURE TO PRODUCE AN INTERMEDIATE BRAZING METAL WHICH COMBINES WITH THE MOLTEN CADMIUM TO PRODUCE A BOND ALLOY, SAID BONDING ALLOY FLOWING INTO SAID BUTT JOINT BETWEEN THE INNER EDGE SURFACE OF THE FIN AND SAID OUTER SURFACE OF THE TUBE BY CAPILLARY ACTION AND UNITING WITH THE FIN AND THE TUBE TO THEREBY PRESENT, UPON COOLING OF THE COMPONENTS, A SOUND INTERCONNECTION OF HIGH HEAT CONDUCTIVITY BETWEEN THE FIN AND THE TUBE.
References Cited (Backward Citations)
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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) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |