US3847684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of quenching zirconium and alloys thereof
Assignee: Teledyne Inc
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Filing: 1973-09-20
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Granted: 1974-11-12
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Expires: 1993-09-20
Abstract
Abstract Zirconium and alloys thereof are quenched from the beta phase temperature range, i.e. at least 1,830*F., into water having a temperature of at least about 140*F., whereby to inhibit the formation of a blocky alpha structure surface layer which ordinarily forms upon subsequent heating in the alpha temperature range.
Inventors
- 👤 D Amick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:48
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/16; C22F1/18; C22F1/186; C22F1/002
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
52 words
IN A METHOD OF HEAT TREATING ZIRCONIUM AND ITS ALLOYS BY QUENCHING FROM THE BETA PHASE TEMPERATURE RANGE FOLLOWED BY SUBJECTING THE MATERIAL TO AN ALPHA RANGE TEMPERATURE TREATMENT; WHEREIN THE IMPROVEMENT, COMPRISES CONDUCTING SAID QUENCHING STEP BY IMMERSING THE MATERIAL IN WATER MAINTAINED AT A TEMPERATURE OF AT LEAST ABOUT 140*F.
Claim 2
Dependent Claim
52 words
IN A METHOD OF HEAT TREATING ZIRCONIUM AND ITS ALLOYS BY QUENCHING FROM THE BETA PHASE TEMPERATURE RANGE FOLLOWED BY SUBJECTING THE MATERIAL TO AN ALPHA RANGE TEMPERATURE TREATMENT; WHEREIN THE IMPROVEMENT, COMPRISES CONDUCTING SAID QUENCHING STEP BY IMMERSING THE MATERIAL IN WATER MAINTAINED AT A TEMPERATURE OF AT LEAST ABOUT 140*F.
Claim 3
Dependent Claim
17 words
The method of claim 1 wherein the water is maintained at a temperature of at least 160*F.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |