Grinding members
Patent 4221612 Issued on September 9, 1980. Estimated Expiration Date: 
October 13, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 13, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2662010 2762704 2867532 3367770 3414442 3663214 3784416 3844844 Manufacture of grinding members of ferrous alloys Grinding members Patent #: 4043842 InventorAssigneeApplicationNo. 05/951107 filed on 10/13/1978US Classes:148/616, Treating or producing white or malleable cast iron148/321, 1.7 percent or more carbon containing (e.g., cast iron)148/324Six percent or more group IV, V or VI transition metal containingExaminersPrimary: Rutledge, L. DewayneAssistant: Skiff, Peter K. Attorney, Agent or FirmInternational ClassesC22C 37/00 (20060101)C22C 37/06 (20060101) C22C 38/36 (20060101) B02C 17/00 (20060101) B02C 17/20 (20060101) Foreign Application Priority Data1977-10-14 FRAbstractForged grinding members of white cast iron containing chromium composed of a solid martensitic or austenitic solution containing a secondary chromium carbides and primary or eutectic chromium carbides of the M7 C3 type, which are finely divided and distributed in a homogeneous manner in the matrix. The grinding members contain from 5 to 15% by weight chromium carbides of the M7 C3 type, i.e. from 2 to 8% chromium. | |
