The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 17, 1993
Filed:
Jun. 19, 1991
Applicant:
Inventors:
David J Ostby, Madison, WI (US);
John M Conover, Brown Deer, WI (US);
Assignee:
Osmose Wood Preserving, Madison, WI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A01N / ;
U.S. Cl.
CPC ...
424409 ; 238 29 ; 238 83 ; 238 84 ; 238303 ; 238304 ; 422 28 ; 422 40 ; 424411 ; 424414 ; 427336 ; 427440 ; 427541 ;
Abstract
A preservative-bearing pad and a method of using same to treat the interface between a railroad cross tie and tie plate. A sandwich of water-soluble active ingredient disposed between two layers of biodegradable hydrophilic backing is simply placed on the adzed portion of a cross tie prior to installation of the tie plate and rail during a rail laying or relaying operation.