Litter box with excrement removing screen
Patent 5531186 Issued on July 2, 1996. Estimated Expiration Date: 
April 24, 2015. 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.
April 24, 2015. 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 3796188 Pet litter separator Cat litter screening device Litter box sifter Patent #: 4817560 InventorsApplicationNo. 427350 filed on 04/24/1995US Classes:119/166Having means for separating waste from absorbent materialExaminersPrimary: Swiatek, Robert P.Assistant: Abbott, Yvonne R. Attorney, Agent or FirmInternational ClassesA01K 001/035A01K 029/00 AbstractA cat litter box which has an open topped structural box (20) with a "U" shaped slot (30) on one side (24). A brush seal (32) is disposed within the box interior defining a pair of opposed seals with the bristle ends contiguously positioned in the middle of the slot. A screen grid tray (42) is located inside the box beneath granular litter material 34). In operation, the tray is lifted up by handles (44) on each end sifting the material therethrough capturing cat excrement for disposal. The tray is inserted into the slot parting the brush seal displacing the litter material until it is pushed fully into the box. A second embodiment includes a pair of mechanical cam handles (52) for levering the tray the final distance of the insertion travel into the cat litter box. | |
