Refractory block

Skip to: Description  ·  Claims  ·  References Cited  · Patent History  ·  Patent History
Description

FIG. 1 is a front, perspective view of a refractory block showing our new design;

FIG. 2 is a back, perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof, the left side being a mirror image thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a back view thereof; and,

FIG. 7 is a bottom view thereof.

Claims

The ornamental design for the refractory block, as shown as described.

Referenced Cited
U.S. Patent Documents
D198114 April 1964 Hall
3181278 May 1965 Jones
3346248 October 1967 Martinet et al.
4069633 January 24, 1978 Cooper et al.
5117604 June 2, 1992 Bly et al.
5647185 July 15, 1997 Forlini
5704781 January 6, 1998 Swoboda
D403437 December 29, 1998 Risi et al.
D516734 March 7, 2006 Keys et al.
20050252145 November 17, 2005 MacDonald et al.
Patent History
Patent number: D567829
Type: Grant
Filed: Apr 29, 2005
Date of Patent: Apr 29, 2008
Assignee: Harbison-Walker Refractories Company (Moon Township, PA)
Inventors: John J. Stephansky (Fair Oaks, PA), John E. Berry (Wexford, PA)
Primary Examiner: Antoine D. Davis
Assistant Examiner: Patricia Palasik
Attorney: Kusner & Jaffe
Application Number: 29/228,940
Classifications
Current U.S. Class: Deforming Or Crushing (includes Element) (5) (D15/123)