US2539248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of bonding aluminum alloys to steel
Assignee: Duracell Inc USA
•
Filing: 1945-09-19
•
Granted: 1951-01-23
•
Expires: 1965-09-19
Abstract
No abstract record available.
Inventors
- 👤 William E Lynch
- 👤 Robert M Strain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:44
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/22; B23K20/227; B23K20/2275; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12771; Y10T428/12861; Y10T428/12896; Y10T428/12903; Y10T428/12917; Y10T428/12924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
THE METHOD OF MAKING ALUMINUM ALLOY-STEEL OVERLAY METAL FROM STRIPS OF ALUMINUM ALLOY AND STEEL WHICH COMPRISES ELECTROPLATING A SILVER DEPOSIT HAVING A THICKNESS NOT EXCEEDING 0.001" ON ONE FACE OF THE STEEL STRIP, SUBJECTING THE FACE OF THE ALUMINUM ALLOY STRIP FIRST TO AN ALKALINE AND THEN TO AN ACID TREATMENT TO REMOVE THEREFROM IMPURITIES AND THE INGREDIENTS ALLOYED WITH THE ALUMINUM BASE THEREBY TO PROVIDE THEREON A BONDING SURFACE OF SUBSTANTIALLY PURE ALUMINUM, PREHEATING BOTH OF SAID STRIPS IN A NON-OXIDIZING ATMOSPHERE TO RAISE THEIR TEMPERATURE TO A WELDING TEMPERATURE IN THE RANGE BETWEEN 350* AND 550* C. AND APPRECIABLY BELOW THE MELTING POINT OF SILVER, AND PASSING SAID STRIPS BETWEEN PRESSURE ROLLS WITH THE SURFACE OF THE SAID SILVER DEPOSIT IN CONTACT WITH THE SAID BONDING SURFACE OF PURE ALUMINUM TO WELD SAID STRIPS TOGETHER.
Claim 2
Independent Claim
138 words
THE METHOD OF MAKING ALUMINUM ALLOY-STEEL OVERLAY METAL FROM STRIPS OF ALUMINUM ALLOY AND STEEL WHICH COMPRISES ELECTROPLATING A SILVER DEPOSIT HAVING A THICKNESS NOT EXCEEDING 0.001" ON ONE FACE OF THE STEEL STRIP, SUBJECTING THE FACE OF THE ALUMINUM ALLOY STRIP FIRST TO AN ALKALINE AND THEN TO AN ACID TREATMENT TO REMOVE THEREFROM IMPURITIES AND THE INGREDIENTS ALLOYED WITH THE ALUMINUM BASE THEREBY TO PROVIDE THEREON A BONDING SURFACE OF SUBSTANTIALLY PURE ALUMINUM, PREHEATING BOTH OF SAID STRIPS IN A NON-OXIDIZING ATMOSPHERE TO RAISE THEIR TEMPERATURE TO A WELDING TEMPERATURE IN THE RANGE BETWEEN 350* AND 550* C. AND APPRECIABLY BELOW THE MELTING POINT OF SILVER, AND PASSING SAID STRIPS BETWEEN PRESSURE ROLLS WITH THE SURFACE OF THE SAID SILVER DEPOSIT IN CONTACT WITH THE SAID BONDING SURFACE OF PURE ALUMINUM TO WELD SAID STRIPS TOGETHER.
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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) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |