Ballast dressing unit on machines which dress and re-distribute railway road bed ballast
Patent 4706395 Issued on November 17, 1987. Estimated Expiration Date: 
May 22, 2005. 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.
May 22, 2005. 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 3007264 3579873 3706145 InventorAssigneeApplicationNo. 06/736771 filed on 05/22/1985US Classes:37/105, Side former171/16RAILROAD BALLAST REMOVAL AND ASSORTING OR SEPARATINGExaminersPrimary: Burr, Edgar S.Assistant: Cohen, Moshe I. Attorney, Agent or FirmInternational ClassesE01B 27/00 (20060101)E01B 27/02 (20060101) Foreign Application Priority Data1984-06-07 ITAbstractBallast dressing unit (17) on machines (10) which dress and re-distribute railway road bed ballast, such unit (17) comprising at least one rotary dressing drum (23-24). | |
