US3320102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of shaping metal
Assignee: United States Steel Corp
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Filing: 1964-11-06
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Granted: 1967-05-16
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Expires: 1984-11-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Perry J Murphy
- 👤 John T Shultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:20
CPC Classifications
C; C21; C21D; C21D8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD OF MAKING SHAPED FERROUS MATERIAL STRUCTURAL MEMBERS HAVING YIELD STRENGTHS OF AT LEAST ABOUT 100,000 P.S.I. COMPRISING SHAPING THE MEMBER WITHIN ITS ELASTIC LIMIT WITHOUT PLASTICALLY DEFORMING THE MEMBER BY EXCEEDING THE MEMBER''S YIELD STRENGTH, RESTRAINING THE MEMBER IN SAID SHAPED CONFIGURATION, HEATING THE MEMBER TO STRESS RELIEVING TEMPERATURE IN THE RANGE OF FROM ABOUT 900*F. TO THE A1 TEMPERATURE, MAINTAINING THE MEMBER AT STRESS RELIEVING TEMPERATURE UNTIL STRESSES CAUSED BY SHAPING ARE SUBSTANTIALLY ELIMINATED AND THEREAFTER COOLING AND UNRESTRAINING SAID MEMBER TO PERMIT HANDLING.
Claim 2
Independent Claim
87 words
A METHOD OF MAKING SHAPED FERROUS MATERIAL STRUCTURAL MEMBERS HAVING YIELD STRENGTHS OF AT LEAST ABOUT 100,000 P.S.I. COMPRISING SHAPING THE MEMBER WITHIN ITS ELASTIC LIMIT WITHOUT PLASTICALLY DEFORMING THE MEMBER BY EXCEEDING THE MEMBER''S YIELD STRENGTH, RESTRAINING THE MEMBER IN SAID SHAPED CONFIGURATION, HEATING THE MEMBER TO STRESS RELIEVING TEMPERATURE IN THE RANGE OF FROM ABOUT 900*F. TO THE A1 TEMPERATURE, MAINTAINING THE MEMBER AT STRESS RELIEVING TEMPERATURE UNTIL STRESSES CAUSED BY SHAPING ARE SUBSTANTIALLY ELIMINATED AND THEREAFTER COOLING AND UNRESTRAINING SAID MEMBER TO PERMIT HANDLING.
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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |