US3586747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of obtaining strips and sheets of zinc and zinc alloys
Assignee: International Lead Zinc Research Organization Inc
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Filing: 1969-04-09
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Granted: 1971-06-22
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Expires: 1989-04-09
Abstract
Abstract A METHOD FOR PREPARING SHEETS OR STRIPS OF ZINC OR ALLOYS OF ZINC BY DIRECT ROLLING OF METAL PARTICLES IS DISCLOSED. THE SIZE OF THE PARTICLES IS PREFERABLY ABOVE A CERTAIN MINIMUM, THAT IS, LARGER THAN ABOUT 0.2 MM. IN THE SMALLEST DIMENSION, AND THE TEMPERATURE AND PRESSURE OF THE ROLLING ARE ALSO ABOVE CERTAIN MINIMUMS, THAT IS, SUFFICIENT TO EFFECT IN A SINGLE ROLLING PASS A PERCENT REDUCTION OF THE METAL OR ALLOY OF AT LEAST ABOUT 80% FROM THE ORIGINAL THICKNESS OF THE COMPACTED PARTICLES. A METHOD FOR THE PREPARATION OF SUITABLE PARTICLES BY ROTATIONAL CASTING IS ALSO DISCLOSED.
Inventors
- 👤 Schrade F Radtke
- 👤 Giovanni Scacciati
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:45
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/10; B22F3/00; B22F3/18
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |