US3304208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of fine grain aluminum alloy sheet
Assignee: Revere Copper and Brass Inc
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Filing: 1964-08-03
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Granted: 1967-02-14
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Expires: 1984-08-03
Abstract
No abstract record available.
Inventors
- 👤 Jager Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:41
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A METHOD FOR PRODUCING A UNIFORMLY FINE GRAINED SHEET PRODUCT FROM A CHILL CAST INGOT OF AN ALUMINUM ALLOY IN WHICH THERE IS PRESENT A NON-PRIMARY MANGANESECONTAINING PHASE AND WHICH IS PROCESSED BY HOMOGENIZING, HOT ROLLING, COLD ROLLING AND ANNEALING BY MEANS OF THE INTER-RELATED CONTROL OF THE THERMAL ASPECTS OF HOMOGENIZING, HOT ROLLING AND ANNEALING TO AS TO INDUCE PROPER PRECIPITATION OF THE NON-PRIMARY PHASE, SAID METHOD COMPRISING (A) HOMOGENIZING THE INGOT AT A TEMPERATURE JUST BELOW THE SOLIDUS TEMPERATURE FOR THE ALLOY FOR A PERIOD NOT IN EXCESS OF ABOUT 10 HOURS, (B) SLOWLY COOLING THE INGOT AT A RATE LESS THAN 50*F. PER HOUR TO A TEMPERATURE WHICH IS NOT IN EXCESS OF 100*F. ABOVE THE INITIAL HOT ROLLING TEMPERATURE, (C) HOT ROLLING AT THE LOWEST PRACTICAL TEMPERATURE, (D) COLD ROLLING THE RESULTING SHEET TO FINAL GAGE, AND (E) ANNEALING FOLLOWING COLD ROLLING AT THE ANNEALING TEMPERATURE OF THE ALUMINUM SHEET SO AS TO CONTINUE THE AFORESTATED PHENOMENA OF PROPER PRECIPITATION OF THE NON-PRIMARY PHASE.
Claim 2
Independent Claim
168 words
A METHOD FOR PRODUCING A UNIFORMLY FINE GRAINED SHEET PRODUCT FROM A CHILL CAST INGOT OF AN ALUMINUM ALLOY IN WHICH THERE IS PRESENT A NON-PRIMARY MANGANESECONTAINING PHASE AND WHICH IS PROCESSED BY HOMOGENIZING, HOT ROLLING, COLD ROLLING AND ANNEALING BY MEANS OF THE INTER-RELATED CONTROL OF THE THERMAL ASPECTS OF HOMOGENIZING, HOT ROLLING AND ANNEALING TO AS TO INDUCE PROPER PRECIPITATION OF THE NON-PRIMARY PHASE, SAID METHOD COMPRISING (A) HOMOGENIZING THE INGOT AT A TEMPERATURE JUST BELOW THE SOLIDUS TEMPERATURE FOR THE ALLOY FOR A PERIOD NOT IN EXCESS OF ABOUT 10 HOURS, (B) SLOWLY COOLING THE INGOT AT A RATE LESS THAN 50*F. PER HOUR TO A TEMPERATURE WHICH IS NOT IN EXCESS OF 100*F. ABOVE THE INITIAL HOT ROLLING TEMPERATURE, (C) HOT ROLLING AT THE LOWEST PRACTICAL TEMPERATURE, (D) COLD ROLLING THE RESULTING SHEET TO FINAL GAGE, AND (E) ANNEALING FOLLOWING COLD ROLLING AT THE ANNEALING TEMPERATURE OF THE ALUMINUM SHEET SO AS TO CONTINUE THE AFORESTATED PHENOMENA OF PROPER PRECIPITATION OF THE NON-PRIMARY PHASE.
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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |