US3349469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making laminated sheet
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1964-05-08
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Granted: 1967-10-31
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Expires: 1984-05-08
Abstract
No abstract record available.
Inventors
- 👤 Muije Pieter
- 👤 William R Mohondro
- 👤 Maurice C Fetzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:34
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; B21D53/045; B23; B23K; B23K20/00; B23K20/22; B23K20/233; B23K20/2333
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE METHOD OF MAKING LAMINATED SHEET WHICH COMPRISES THE STEPS OF CLEANING THE CONTACTING SURFACES OF THE INDIVIDUAL LAYERS, INTERPOSING A CORE LAYER OF ZINCALUMINUM ALLOY CONSISTING ESSENTIALLY OF ZINC AND FROM ABOUT 0.1% TO 30% ALUMINUM BETWEEN ALUMINOUS METAL LAYERS TO FORM A SANDWICH STRUCTURE, SAID CORE LAYER HAVING A THICKNESS SUCH THAT THE THCIKNESS OF THE CORE LAYER IN THE FINAL LAMINATED SHEET IS NOT GREATER THAN 2% OF THE TOTAL THICKNESS OF THE LAMINATED SHEET, JOINING THE ALUMINOUS METAL LAYERS TOGETHER AT THEIR FORWARD END, HEATING THE STRUCTURE TO ABOUT 500-720*F., HOT ROLLING THE HEATED STRUCTURE TO FORM A LAMINATED SHEET HAVING AN INTEGRAL
Claim 2
Independent Claim
107 words
THE METHOD OF MAKING LAMINATED SHEET WHICH COMPRISES THE STEPS OF CLEANING THE CONTACTING SURFACES OF THE INDIVIDUAL LAYERS, INTERPOSING A CORE LAYER OF ZINCALUMINUM ALLOY CONSISTING ESSENTIALLY OF ZINC AND FROM ABOUT 0.1% TO 30% ALUMINUM BETWEEN ALUMINOUS METAL LAYERS TO FORM A SANDWICH STRUCTURE, SAID CORE LAYER HAVING A THICKNESS SUCH THAT THE THCIKNESS OF THE CORE LAYER IN THE FINAL LAMINATED SHEET IS NOT GREATER THAN 2% OF THE TOTAL THICKNESS OF THE LAMINATED SHEET, JOINING THE ALUMINOUS METAL LAYERS TOGETHER AT THEIR FORWARD END, HEATING THE STRUCTURE TO ABOUT 500-720*F., HOT ROLLING THE HEATED STRUCTURE TO FORM A LAMINATED SHEET HAVING AN INTEGRAL
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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |