US3032448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing lacquered thin sheets of aluminum
Assignee: Constellium Singen GmbH
•
Filing: 1959-05-13
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Granted: 1962-05-01
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Expires: 1979-05-13
Abstract
No abstract record available.
Inventors
- 👤 Siebel Gustav
- 👤 Tragner Erich
- 👤 Broockmann Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:35
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/06; C22C21/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
THE METHOD FOR PRODUCING LACQUERED THIN, DEFORMABLE SHEETS OF ALUMINUM WITH HIGH MECHANICAL STRENGTH COMPRISING THE STEPS OF SOLUTION ANNEALING AND QUENCHING TO ROOM TEMPERATURE A ROLLED SHEET OF AN ALUMINUM ALLOY CONTAINING AT LEAST ONE OF THE CONSTITUENTS SELECTED FROM A GROUP CONSISTING OF MG, SI, ZN, CR, MN AND TI, IN AN AMOUNT NOT TO EXCEED 1.5% BY WEIGHT, THE SAID CONSTITUENTS BEING IN SUCH COMBINATION AND AMOUNT THAT THE ALLOY IS HARDENABLE BY HEAT TREATMENT, THESE ANNEALING AND QUENCHING STEPS TAKING PLACE AT A THICKNESS AT LEAST TWICE THE DESIRED ULTIMATE THICKNESS OF THE SHEET; AGING THE SHET FOR ATTAINING A NUTRAL AGING EFFECT; COLD ROLLING THE SHEET TO END THICKNESS; COVERING THE SHEET WITH THE SOLUTION OF A VARNISH GIVING A COATING SUITABLE FOR DEEPDRAWING AND HEATING THE LACQUERED SHEET TO 120 TO 240* C. FOR DRYING OR STOVING THE VARNISH, WHEREBY NOT ONLY THE MALLEABILITY BUT ALSO THE MECHANICAL STRENGTH OF THE SHEET BECOME INCREASED IN COMPARISON TO THE MECHANICAL STRENGTH OF THE SHEET IN THE COLD-ROLLED STATE.
Claim 2
Independent Claim
173 words
THE METHOD FOR PRODUCING LACQUERED THIN, DEFORMABLE SHEETS OF ALUMINUM WITH HIGH MECHANICAL STRENGTH COMPRISING THE STEPS OF SOLUTION ANNEALING AND QUENCHING TO ROOM TEMPERATURE A ROLLED SHEET OF AN ALUMINUM ALLOY CONTAINING AT LEAST ONE OF THE CONSTITUENTS SELECTED FROM A GROUP CONSISTING OF MG, SI, ZN, CR, MN AND TI, IN AN AMOUNT NOT TO EXCEED 1.5% BY WEIGHT, THE SAID CONSTITUENTS BEING IN SUCH COMBINATION AND AMOUNT THAT THE ALLOY IS HARDENABLE BY HEAT TREATMENT, THESE ANNEALING AND QUENCHING STEPS TAKING PLACE AT A THICKNESS AT LEAST TWICE THE DESIRED ULTIMATE THICKNESS OF THE SHEET; AGING THE SHET FOR ATTAINING A NUTRAL AGING EFFECT; COLD ROLLING THE SHEET TO END THICKNESS; COVERING THE SHEET WITH THE SOLUTION OF A VARNISH GIVING A COATING SUITABLE FOR DEEPDRAWING AND HEATING THE LACQUERED SHEET TO 120 TO 240* C. FOR DRYING OR STOVING THE VARNISH, WHEREBY NOT ONLY THE MALLEABILITY BUT ALSO THE MECHANICAL STRENGTH OF THE SHEET BECOME INCREASED IN COMPARISON TO THE MECHANICAL STRENGTH OF THE SHEET IN THE COLD-ROLLED STATE.
References Cited (Backward Citations)
US1083903A
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US1472739A
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US2394546A
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US2695253A
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US2877195A
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US2837450A
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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) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |