US3347715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treatment of steel
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1964-04-08
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Granted: 1967-10-17
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Expires: 1984-04-08
Abstract
No abstract record available.
Inventors
- 👤 Pfeil Peter Charles Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:26
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D6/00; C21D6/004; G; G21; G21C; G21C3/00; G21C3/02; G21C3/04; G21C3/06; C21D6/02; C21D8/0221; C21D8/0236; C21D8/0247; C21D8/0273; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A METHOD OF HEAT TREATING AN AUSTENITIC STAINLESS STEEL TO REDUCE THE TENDENCY OF SAID STEEL TO UNDER GO A REDUCTION IN HIGH TEMPERATURE DUCTILITY ON IRRADIATION COMPRISING THE STEPS OF COLD WORKING THE STEEL, ANNEALING THE COLD WORKED STEEL AT A TEMPERATURE IN THE RANGE 800-900*C., AND REPEATING SAID COLD WORKING STEP AND SAID ANNEALING STEP AT LEAST ONCE.
Claim 2
Independent Claim
60 words
A METHOD OF HEAT TREATING AN AUSTENITIC STAINLESS STEEL TO REDUCE THE TENDENCY OF SAID STEEL TO UNDER GO A REDUCTION IN HIGH TEMPERATURE DUCTILITY ON IRRADIATION COMPRISING THE STEPS OF COLD WORKING THE STEEL, ANNEALING THE COLD WORKED STEEL AT A TEMPERATURE IN THE RANGE 800-900*C., AND REPEATING SAID COLD WORKING STEP AND SAID ANNEALING STEP AT LEAST ONCE.
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) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |