US4017338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steel member for reinforcing rubber composites and method of making same
Assignee: Monsanto Co
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Filing: 1975-11-24
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Granted: 1977-04-12
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Expires: 1995-11-24
Abstract
Abstract A steel member, essentially rectangular in cross-section, obtained by mechanically working round steel stock, having an aspect ratio greater than 2, wherein the member is characterized by a tensile strength greater than 200 KSI, a fatigue endurance limit greater than 100 KSI and a heat treated microstructure of tempered martensite, bainite or mixtures thereof.
Inventors
- 👤 Milan F. Kozak
- 👤 Mark W. Taylor
- 👤 Ronald C. Elder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:35
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/06; C21D8/02; C21D8/0221; C21D9/00; C21D9/52; C21D1/00; C21D1/18; C21D2211/00; C21D2211/002; C21D2211/008; C21D8/0236
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
A method for making steel articles for reinforcing rubber composites which comprises: a. providing steel stock with a round cross-section having a carbon content of at least 0.35 percent and an essentially pearlitic microstructure; b.. forming an essentially rectangular member from said stock wherein said member has an aspect ratio of at least 2; and c. heat treating said member to provide a microstructure of tempered martensite, bainite or mixtures thereof.
Claim 2
Independent Claim
71 words
A method for making steel articles for reinforcing rubber composites which comprises: a. providing steel stock with a round cross-section having a carbon content of at least 0.35 percent and an essentially pearlitic microstructure; b.. forming an essentially rectangular member from said stock wherein said member has an aspect ratio of at least 2; and c. heat treating said member to provide a microstructure of tempered martensite, bainite or mixtures thereof.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said heat treating comprises austenitizing, quenching and tempering said member.
Claim 4
Independent Claim
18 words
The method of claimm 1 wherein said members are passed through a mechanical straightener after said heat treating.
References Cited (Backward Citations)
US3580746A
Cited
US3953250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |