Patent US3295197A successfully refreshed from Google Patents.
US3295197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stainless steel clad with aluminum
Assignee: Revere Copper and Brass Inc
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Filing: 1964-05-14
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Granted: 1967-01-03
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Expires: 1984-05-14
Abstract
No abstract record available.
Inventors
- 👤 Edward S Bunn
- 👤 Charles R Mackey
- 👤 Julius L Giovannucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:51
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/22; B23K20/227; B23K20/2275
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
PROCESS FOR BONDING ALUMINUM TO STAINLESS STELL WHICH COMPRISES: BRINGING SHEET OF ALUMINUM HAVING THE NORMAL PROTECTIVE COATING OF ALUMINUM OXIDE THEREON INTO SURFACE CONTACT WITH A SHEET OF STAINLESS STEEL; MECHANICALLY WORKING THE SHEETS WHILE AT A TEMPERATURE OF BETWEEN ABOUT 700 TO 1050*F. TO COMPRESS THE ALUMINUM AGAINST THE STAINLESS STEEL AND CAUSE THE LAYER OF ALUMINUM ADJACENT THE STEEL SURFACE TO FLOW PLASTICALLY WITH RESPECT TO THE STEEL SURFACE WHEREBY THE LAYER OF ALUMINUM IS ADHESIVELY BONDED TO THE LAYER OF STAINLESS STEEL; COLD WORKING THE ADHESIVELY BONDED LAYERS OF STAINLESS STEEL AND ALUMINUM TO ELONGATE THE METAL AT LEAST 5% WHILE COMPRESSING THE TWO LAYERS TOGETHER TO PARTIALLY BREAK DOWN THE MECHANICAL ADHESIVE BOND BETWEEN THE SURFACE OF THE TWO LAYERS OF METAL AND THUS EXPOSE AREAS OF NACENT OF METALLIC ALUMINUM FREE OF OXIDE FILM IN COMPRESSIVE CONTACT WITH THE ADJOINING SURFACE OF THE STAINLESS STEEL; AND HEATING THE COLD WORKED LAYERS OF ALUMINUM AND STAINLESS STEEL TO A TEMPERATURE OF AT LEAST 500*F. TO OBTAIN A METALLURGICAL BOND BETWEEN THE ADJOINING SURFACES OF STAINLESS STEEL AND METALLIC ALUMINUM.
Claim 2
Dependent Claim
184 words
PROCESS FOR BONDING ALUMINUM TO STAINLESS STELL WHICH COMPRISES: BRINGING SHEET OF ALUMINUM HAVING THE NORMAL PROTECTIVE COATING OF ALUMINUM OXIDE THEREON INTO SURFACE CONTACT WITH A SHEET OF STAINLESS STEEL; MECHANICALLY WORKING THE SHEETS WHILE AT A TEMPERATURE OF BETWEEN ABOUT 700 TO 1050*F. TO COMPRESS THE ALUMINUM AGAINST THE STAINLESS STEEL AND CAUSE THE LAYER OF ALUMINUM ADJACENT THE STEEL SURFACE TO FLOW PLASTICALLY WITH RESPECT TO THE STEEL SURFACE WHEREBY THE LAYER OF ALUMINUM IS ADHESIVELY BONDED TO THE LAYER OF STAINLESS STEEL; COLD WORKING THE ADHESIVELY BONDED LAYERS OF STAINLESS STEEL AND ALUMINUM TO ELONGATE THE METAL AT LEAST 5% WHILE COMPRESSING THE TWO LAYERS TOGETHER TO PARTIALLY BREAK DOWN THE MECHANICAL ADHESIVE BOND BETWEEN THE SURFACE OF THE TWO LAYERS OF METAL AND THUS EXPOSE AREAS OF NACENT OF METALLIC ALUMINUM FREE OF OXIDE FILM IN COMPRESSIVE CONTACT WITH THE ADJOINING SURFACE OF THE STAINLESS STEEL; AND HEATING THE COLD WORKED LAYERS OF ALUMINUM AND STAINLESS STEEL TO A TEMPERATURE OF AT LEAST 500*F. TO OBTAIN A METALLURGICAL BOND BETWEEN THE ADJOINING SURFACES OF STAINLESS STEEL AND METALLIC ALUMINUM.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |