Patent US2937435A successfully refreshed from Google Patents.
US2937435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clad metal body and method of making the same
Assignee: Vereinigte Leichtmetallwerke GmbH
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Filing: 1957-08-09
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Granted: 1960-05-24
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Expires: 1977-08-09
Abstract
No abstract record available.
Inventors
- 👤 Brenner Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:04
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/22; B23K20/227; B23K20/2275; B32; B32B; B32B15/00; B32B15/01; B32B15/012; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757; Y10T428/12764
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A CLAD METAL BODY COMPRISING, IN COMBINATION, A BASE BODY MADE OF STEEL, A FACING SHEET COMPOSED OF A SUBSTANCE BELONGING TO THE GROUP CONSISTING OF HIGH PURITY ALUMINUM HAVING A PURITY OF AT LEAST 99.9%, ALLOYS OF SAID HIGH PURITY ALUMINUM AND UP TO 5% MAGNESIUM, ALLOYS OF SAID HIGH PURITY ALUMINUM, UP TO 5% MAGNESIUM AND UP TO 6% ZINC, AND ALLOYS OF SAID HIGH PURITY ALUMINUM, UP TO 5% MAGNESIUM, UP TO 6% ZINC AND UP TO 0.5% BERYLLIUM, AND AN INTERMEDIATE LAYER CONSISTING ESSENTIALLY OF AN ALUMINUM-SILICON ALLOY CONTAINING BETWEEN 0.5% AND 2.0% SILICON, FIRMLY ADHERING TO ONE FACE OF SAID FACING SHEET AND TO SAID BASE BODY, SAID INTERMEDIATE LAYER HAVING A THICKNESS OF AT LEAST ABOUT 0.05 MM. SO AS TO PREVENT DIFFUSION OF IRON FROM SAID BASE BODY TO SAID FACING SHEET, WHEREBY FORMATION OF IRON ALUMINIDES DURING HOT ROLLING AND SOFT ANNEALING OF SAID CLAD METAL BODY IS PREVENTED DUE TO THE INTERPOSITION OF SAID ALUMINUM-SILICON ALLOY LAYER BETWEEN SAID BASE BODY AND SAID FACING SHEET.
Claim 2
Dependent Claim
174 words
A CLAD METAL BODY COMPRISING, IN COMBINATION, A BASE BODY MADE OF STEEL, A FACING SHEET COMPOSED OF A SUBSTANCE BELONGING TO THE GROUP CONSISTING OF HIGH PURITY ALUMINUM HAVING A PURITY OF AT LEAST 99.9%, ALLOYS OF SAID HIGH PURITY ALUMINUM AND UP TO 5% MAGNESIUM, ALLOYS OF SAID HIGH PURITY ALUMINUM, UP TO 5% MAGNESIUM AND UP TO 6% ZINC, AND ALLOYS OF SAID HIGH PURITY ALUMINUM, UP TO 5% MAGNESIUM, UP TO 6% ZINC AND UP TO 0.5% BERYLLIUM, AND AN INTERMEDIATE LAYER CONSISTING ESSENTIALLY OF AN ALUMINUM-SILICON ALLOY CONTAINING BETWEEN 0.5% AND 2.0% SILICON, FIRMLY ADHERING TO ONE FACE OF SAID FACING SHEET AND TO SAID BASE BODY, SAID INTERMEDIATE LAYER HAVING A THICKNESS OF AT LEAST ABOUT 0.05 MM. SO AS TO PREVENT DIFFUSION OF IRON FROM SAID BASE BODY TO SAID FACING SHEET, WHEREBY FORMATION OF IRON ALUMINIDES DURING HOT ROLLING AND SOFT ANNEALING OF SAID CLAD METAL BODY IS PREVENTED DUE TO THE INTERPOSITION OF SAID ALUMINUM-SILICON ALLOY LAYER BETWEEN SAID BASE BODY AND SAID FACING SHEET.
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) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |