US3843416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superplastic zinc/aluminium alloys
Assignee: Imperial Smelting Corp Ltd
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Filing: 1972-04-06
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Granted: 1974-10-22
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Expires: 1992-04-06
Abstract
Abstract 1. A METHOD OF PRODUCING SUPERPLASTIC ZINC/ALUMINIUM ALLOY SHEET FROM A BODY OF ALLOY CONSISTING ESSENTIALLY OF ZINC AND ALUMINIUM BEING FROM 1% TO 19.8% BY WEIGHT, THE AMOUNT OF ANY COPPER PRESENT AS A FURTHER ALLOYING ELEMENT BEING UP TO 1% BY WEIGHT, AND THE AMOUNT OF ANY MAGNESIUM PRESENT AS A FURTHER ALLOYING ELEMENT BEING UP TO 1% BY WEIGHT, WHEREBY THE ALLOY EXHIBITS THE ZINC/ALUMINUM EUTETIC STRUCTURE, SAID METHOD COMPRISING FINISH ROLLING SAID BODY OF ALLOY AT A TEMPERATURE BETWEEN 20 AND 200* C. TO PRODUCE A SHEET WHOSE THICKNESS IS REDUCED BY BETWEEN 50% AND 99% BASED ON THE STARTING THICKNESS.
Inventors
- 👤 C Cross
- 👤 S Kapoor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:21
CPC Classifications
B; B21; B21B; B21B3/00; C; C22; C22C; C22C18/00; C22C18/04; C22F; C22F1/00; C22F1/16; C22F1/165; Y; Y10; Y10S; Y10S420/00; Y10S420/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A METHOD OF PRODUCING SUPERPLASTIC ZINC/ALUMINIUM ALLOY SHEET FROM A BODY OF ALLOY CONSISTING ESSENTIALLY OF ZINC AND ALUMINIUM BEING FROM 1% TO 19.8% BY WEIGHT, THE AMOUNT OF ANY COPPER PRESENT AS A FURTHER ALLOYING ELEMENT BEING UP TO 1% BY WEIGHT, AND THE AMOUNT OF ANY MAGNESIUM PRESENT AS A FURTHER ALLOYING ELEMENT BEING UP TO 1% BY WEIGHT, WHEREBY THE ALLOY EXHIBITS THE ZINC/ALUMINUM EUTETIC STRUCTURE, SAID METHOD COMPRISING FINISH ROLLING SAID BODY OF ALLOY AT A TEMPERATURE BETWEEN 20 AND 200* C. TO PRODUCE A SHEET WHOSE THICKNESS IS REDUCED BY BETWEEN 50% AND 99% BASED ON THE STARTING THICKNESS.
Claim 2
Independent Claim
104 words
A METHOD OF PRODUCING SUPERPLASTIC ZINC/ALUMINIUM ALLOY SHEET FROM A BODY OF ALLOY CONSISTING ESSENTIALLY OF ZINC AND ALUMINIUM BEING FROM 1% TO 19.8% BY WEIGHT, THE AMOUNT OF ANY COPPER PRESENT AS A FURTHER ALLOYING ELEMENT BEING UP TO 1% BY WEIGHT, AND THE AMOUNT OF ANY MAGNESIUM PRESENT AS A FURTHER ALLOYING ELEMENT BEING UP TO 1% BY WEIGHT, WHEREBY THE ALLOY EXHIBITS THE ZINC/ALUMINUM EUTETIC STRUCTURE, SAID METHOD COMPRISING FINISH ROLLING SAID BODY OF ALLOY AT A TEMPERATURE BETWEEN 20 AND 200* C. TO PRODUCE A SHEET WHOSE THICKNESS IS REDUCED BY BETWEEN 50% AND 99% BASED ON THE STARTING THICKNESS.
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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |