Pet litter apparatus

Details Pet litter apparatus Pet litter apparatus

2005-08-09

2005-08-09

Poon, Peter M. (Department: 3643)

Animal husbandry

Waste toilet or related device

Walled receptacle; e.g., litter box, etc., containing...

C119S168000, C119S161000, C119S529000, C209S352000, C209S365200, C209S379000, C209S374000, C209S258000, C241S083000, C312S210500

Reexamination Certificate

active

06925961

ABSTRACT:
A pet litter apparatus has an upper screen to retain litter and debris, a plurality of upper bars, a lower plurality of bars, mechanism for lowering the lower plurality of bars to define spaces for passage of particulate matter between the upper and lower bars, by rotating rods on sprockets to lower the second plurality of bars.

REFERENCES:
patent: 3194397 (1965-07-01), Taege
patent: 3908597 (1975-09-01), Taylor
patent: 4602593 (1986-07-01), Gross
patent: 4616598 (1986-10-01), Burniski et al.
patent: 4970987 (1990-11-01), Deyle
patent: 5267530 (1993-12-01), Zamoyski
patent: 5325815 (1994-07-01), Gumpesberger
patent: 5503110 (1996-04-01), Miller
patent: 4301468 (1993-07-01), None
patent: 326069 (1989-08-01), None
patent: 2658097 (1991-08-01), None

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