Patents by Inventor Knut H. Larsen

Knut H. Larsen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5855186
    Abstract: A sanitization system for cat litter boxes is presented which is composed of a scoop device for straining cat litter where the scoop device has a handle member from which a scoop region extends axially. At a predetermined distance axially from the scoop region, a containment member extends laterally of the handle where the containment member has a multiplicity of venting orifices extending therethrough. A fluid reservoir is removably attachable to the cat litter box. The fluid reservoir is defined by a housing having an open end and a cavity chamber where the cavity chamber is so dimensioned and constructed to be in fluid communication with the open to permit the passage of fluid through the open end. A deodorizing and disinfectant fluid is carried in the reservoir.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: January 5, 1999
    Assignee: Ashley Products Corporation
    Inventors: Knut H. Larsen, Ashley L. Larsen, Deborah L. Demelo
  • Patent number: 5775258
    Abstract: A sanitization system for cat litter boxes is presented which is composed of a scoop device for straining cat litter where the scoop device has a handle member from which a scoop region extends axially. At a predetermined distance axially from the scoop region, a containment member extends laterally of the handle where the containment member has a multiplicity of venting orifices extending therethrough. A fluid reservoir is removably attachable to the cat litter box. The fluid reservoir is defined by a housing having an open end and a cavity chamber where the cavity chamber is so dimensioned and constructed to be in fluid communication with the open to permit the passage of fluid through the open end. A deodorizing and disinfectant fluid is carried in the reservoir.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: July 7, 1998
    Inventors: Knut H. Larsen, Ashley L. Larsen, Deborah L. Demelo
  • Patent number: 4404006
    Abstract: A filter device having a first housing and a second housing clasping therebetween a filter membrane. The housings are domed or convexly-shaped and have cylindrical hubs. A peripheral flange extends radially away from each of said dome-shaped housings and one of the pheripheral flanges has integrally formed thereon a plurality of ribs of predetermined length laying on a circumference of said one peripheral flange at arcuate locations therearound. The filter membrane is of circular configuration having radial projections extending around the circumference thereof. The ribs fit between the projections so that ultrasonic welding melts the ribs and fuses the two housings together, holding the filter membrane therebetween.
    Type: Grant
    Filed: June 19, 1981
    Date of Patent: September 13, 1983
    Inventors: Charles D. Williams, Knut H. Larsen