Patent US1157636A successfully refreshed from Google Patents.
Patent US3717513A successfully refreshed from Google Patents.
US3717513A
Expired / Lapsed
US
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Process for the production of composite sheets
Assignee: Pechiney SA
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Filing: 1971-12-03
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Granted: 1973-02-20
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Expires: 1991-12-03
Abstract
Abstract THE INVENTION RELATES TO THE PLATING OF SHEETS OF FERROUS METAL WITH ALUMINUM HAVING A THICKNESS LESS THAN 0.5 MM. BY CO-ROLLING, WHEREIN THE COLD WORKED SHEETS ARE SUBJECTED TO A RESIDENCE TIME OF AT LEAST 1 HOUR IN A TEMPERATURE ZONE OF FROM 275 TO 460C. TO AVOID THE APPEARANCE OF INTERMETALLIC COMPOUNDS OF THE AL3FE TYPE.
Inventors
- 👤 D Adenis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:29
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/22; B23K20/227; B23K20/2275; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |