sifting tray for use with a litter pan

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

FIG. 1 is a front elevational view of the sifting tray for use with a litter pan showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is an isometric view thereof.

Referenced Cited
U.S. Patent Documents
D233771 November 1974 Dirck
D258212 February 10, 1981 Negrete
D289095 March 31, 1987 Chiodo et al.
2963003 December 1960 Oberg et al.
2971493 February 1961 Robb
3141441 July 1964 Russell
3246630 April 1966 Dearine et al.
3716371 February 1973 Calvert et al.
3908597 September 1975 Taylor
4171680 October 23, 1979 Silver et al.
4325325 April 20, 1982 Larter
4325822 April 20, 1982 Miller
4505226 March 19, 1985 Carlson
4576115 March 18, 1986 Gordon
4646684 March 3, 1987 Embry
4649862 March 17, 1987 Neary
4771731 September 20, 1988 Dery et al.
5211133 May 18, 1993 Foley
5261350 November 16, 1993 Vavrek
Foreign Patent Documents
608021 July 1926 FRX
910 1886 GBX
141855 September 1919 GBX
Other references
  • Pedigrees The Pet Catalog; p. 14 Item L. #G30-0592 Lift & Sift Litter Box. Taylor Gifts Catalog; p. 36, item #7493 Lift & Sift Litter Box. The Oderless Cat Toilet Advertisement in House Beautiful; Sep. 1971; p. 180.
Patent History
Patent number: D351489
Type: Grant
Filed: Dec 24, 1992
Date of Patent: Oct 11, 1994
Inventor: John K. Helfrick (Winchester, VA)
Primary Examiner: Cathy Anne MacCormac
Attorney: Hugh E. Smith
Application Number: 0/2,982
Classifications
Current U.S. Class: Waste Collector (e.g., Litter Box, Etc.) (D30/161); D/7667