US3341373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating zirconium-base alloys
Assignee: Imperial Metal Industries Kynoch Ltd
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Filing: 1963-09-25
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Granted: 1967-09-12
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Expires: 1983-09-25
Abstract
No abstract record available.
Inventors
- 👤 Evans Evan William
- 👤 Lees Donald Grainger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:59
CPC Classifications
C; C22; C22C; C22C16/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A METHOD OF HEAT-TREATING AN ALLOY CONSISTING OF 2-3% NIOBIUM, BALANCE ZIRCONIUM APART FROM USUAL IMPURITIES INCLUDES THE STEPS OF COLD-WORKING THE ALLOY UP TO 50% REDUCTION APPROXIMATELY, SOLUTION-TREATING AT A TEMPERATURE ABOVE THE ALPHA/ALPHA PLUS BETA TRANSITION TEMPERATURE, COLD-WORKING A SECOND TIME TO A REDUCTION BETWEEN APPROXIMATELY 10% AND 50% REDUCTION AND AGEING AT A TEMPERATURE BETWEEN 470*-520*C.
Claim 2
Independent Claim
59 words
A METHOD OF HEAT-TREATING AN ALLOY CONSISTING OF 2-3% NIOBIUM, BALANCE ZIRCONIUM APART FROM USUAL IMPURITIES INCLUDES THE STEPS OF COLD-WORKING THE ALLOY UP TO 50% REDUCTION APPROXIMATELY, SOLUTION-TREATING AT A TEMPERATURE ABOVE THE ALPHA/ALPHA PLUS BETA TRANSITION TEMPERATURE, COLD-WORKING A SECOND TIME TO A REDUCTION BETWEEN APPROXIMATELY 10% AND 50% REDUCTION AND AGEING AT A TEMPERATURE BETWEEN 470*-520*C.
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |