US3595643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Razor blade of a chromium containing steel
Assignee: Sandvik AB
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Filing: 1966-06-10
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Granted: 1971-07-27
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Expires: 1986-06-10
Abstract
Abstract A RAZOR BLADE MADE OF A CHROMIUM STAINLESS STEEL HAVING GOOD CORROSION RESISTANCE AND CUTTING PROPERTIES AND ALSO A METHOD FORMING SUCH AN ARTICLE IS DICLOSED. THE STEEL CONTAINS .30-45 CARBON, 11-16 CR, A MEMBER OF THE CLASS CONSISTING OF TUNGSTEN AND MOLYBDENUM WHEREIN THE AMOUNT OF MO MAY BE .5-2.5% AND W1.0-5%, SI MAX. 70, MN 1.5 MAX., 0-2% OF VA, TA, TI AND ZR AND 0-1% CO, NI, CU, AL, BE AND B. THE STELL MAY BE FORMED BY COLD ROLLING, HARDENING BY HEATING TO A RANGE OF 10001150*C. SUBSEQUENT TEMPERING MAY BE UTILIZED.
Inventors
- 👤 Joseph F Boyce
- 👤 Axel Vilhelm Bernstein
- 👤 Jan-Christer Henric Ove Carlen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:26
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/54; B21; B21D; B21D53/00; B21D53/60; B21D53/64; B21D53/645; B26B21/08; B26B21/14; B26B21/26; B26B21/58; C; C21; C21D; C21D8/00; C21D8/02; C21D9/00; C21D9/18; C22; C22C; C22C38/00; C22C38/18; C22C38/22; C21D1/00; C21D1/18; C21D2211/00; C21D2211/008; C21D6/00; C21D6/04; C21D8/0247; C21D8/0273
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |