US3313660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting articles and stock therefor and methods of making the same
Assignee: Crucible Materials Corp
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Filing: 1963-07-15
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Granted: 1967-04-11
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Expires: 1983-07-15
Abstract
No abstract record available.
Inventors
- 👤 Milton B Vordahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:16
CPC Classifications
C; C23; C23C; C23C12/00; B; B26; B26B; B26B21/00; B26B21/54; B26B21/58; C21; C21D; C21D9/00; C21D9/18; C23C30/00; C23C30/005; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/932; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12146
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A METHOD OF PRODUCING FLAT METAL ARTICLES FOR CUTTING BLADES, COMPRISING FORMING A LAMINATED STOCK CONSISTING OF AN INNER LAYER COMPRISING A STRONG CARBIDE-FORMING METAL AND OUTER LAYERS COMPRISING A MECHANICALLY WORKABLE, MATRIX METAL HAVING SUBSTANTIAL SOLID SOLUBILITY FOR CARBON AND FORMING THEREWITH CARBIDES RELATIVELY LESS STABLE THAN THOSE FORMED BY THE STRONG CARBIDE-FORMING METAL OF THE INNER LAYER, HEATING THE LAMINATED STOCK TO DIFFUSE THE CARBIDE-FORMING METAL OF THE INNER LAYER INTO ADJACENT PORTIONS OF THE OUTER LAYERS, CARBURIZING THE STOCK, ANNEALING THE CARBURIZED STOCK TO EFFECT DIFFUSION OF CARBON THERETHROUGH AND TO FORM A CENTRALLY DISPOSED, DISCRETE, INTERIOR LAYER OF MATRIX METAL CONTAINING A SUBSTANTIALLY HOMOGENEOUS DISPERSION OF STABLE CARBIDES, PARTIALLY DECARBURIZING THE STOCK TO SUBSTANTIALLY ELIMINATE THE RELATIVELY MORE UNSTABLE CARBIDES AND DISSOLVED CARBON AND TO RESTORE THE OUTER LAYERS OF MATRIX METAL TO A MECHANICALLY WORKABLE CONDITION, AND ROLLING THE STOCK TO A DESIRED, FINAL ARTICLE THICKNESS.
Claim 2
Independent Claim
151 words
A METHOD OF PRODUCING FLAT METAL ARTICLES FOR CUTTING BLADES, COMPRISING FORMING A LAMINATED STOCK CONSISTING OF AN INNER LAYER COMPRISING A STRONG CARBIDE-FORMING METAL AND OUTER LAYERS COMPRISING A MECHANICALLY WORKABLE, MATRIX METAL HAVING SUBSTANTIAL SOLID SOLUBILITY FOR CARBON AND FORMING THEREWITH CARBIDES RELATIVELY LESS STABLE THAN THOSE FORMED BY THE STRONG CARBIDE-FORMING METAL OF THE INNER LAYER, HEATING THE LAMINATED STOCK TO DIFFUSE THE CARBIDE-FORMING METAL OF THE INNER LAYER INTO ADJACENT PORTIONS OF THE OUTER LAYERS, CARBURIZING THE STOCK, ANNEALING THE CARBURIZED STOCK TO EFFECT DIFFUSION OF CARBON THERETHROUGH AND TO FORM A CENTRALLY DISPOSED, DISCRETE, INTERIOR LAYER OF MATRIX METAL CONTAINING A SUBSTANTIALLY HOMOGENEOUS DISPERSION OF STABLE CARBIDES, PARTIALLY DECARBURIZING THE STOCK TO SUBSTANTIALLY ELIMINATE THE RELATIVELY MORE UNSTABLE CARBIDES AND DISSOLVED CARBON AND TO RESTORE THE OUTER LAYERS OF MATRIX METAL TO A MECHANICALLY WORKABLE CONDITION, AND ROLLING THE STOCK TO A DESIRED, FINAL ARTICLE THICKNESS.
References Cited (Backward Citations)
US2531731A
Cited
US3109877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |