Patents by Inventor Walter B. Sandison

Walter B. Sandison 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: 5567510
    Abstract: Aqueous-alkali disposable articles are disclosed. The articles are made from films or non-woven webs or composites of films and webs where the film or nonwoven web comprises a hydrolytically degradable polymer and preferably also comprises a water soluble polymer. Multilayer microfibers of at least one layer of a hydrolytically degradable polymer and at least one layer of a water soluble polymer are particularly disclosed. The articles have water resistance during preparation, storage, and use with mammals but are dispersible when submersed in water at conditions of elevated temperature, elevated pH, and during a single commercial laundry cycle. The articles solve both the problem of solid waste disposal prevalent with single use garments and the problem of repeated cleansing and recycling of multiple use garments. Contamination associated with the articles of the invention after their use will be disinfected during the commercial laundry cycle that is utilized to disperse the article.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: October 22, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gregg A. Patnode, John E. Bruno, Denise R. Rutherford, Walter B. Sandison, Dietmar Schlei
  • Patent number: 5508101
    Abstract: Aqueous-alkali disposable articles are disclosed. The articles are made from films or non-woven webs or composites of films and webs where the film or non-woven web comprises a hydrolytically degradable polymer and preferably also comprises a water soluble polymer. Multilayer microfibers of at least one layer of a hydrolytically degradable polymer and at least one layer of a water soluble polymer are particularly disclosed. The articles have water resistance during preparation, storage, and use with mammals but are dispersible when submersed in water at conditions of elevated temperature, elevated pH, and during a single commercial laundry cycle. The articles solve both the problem of solid waste disposal prevalent with single use garments and the problem of repeated cleansing and recycling of multiple use garments. Contamination associated with the articles of the invention after their use will be disinfected during the commercial laundry cycle that is utilized to disperse the article.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: April 16, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gregg A. Patnode, John E. Bruno, Denise R. Rutherford, Walter B. Sandison, Dietmar Schlei
  • Patent number: 5472518
    Abstract: Method of disposing aqueous-alkali disposable articles is disclosed. The articles are made from films or non-woven webs or composites of films and webs where the film or non-woven web comprises a hydrolytically degradable polymer and preferably also comprises a water soluble polymer. Multilayer microfibers of at least one layer of a hydrolytically degradable polymer and at least one layer of a water soluble polymer are particularly disclosed. The articles have water resistance during preparation, storage, and use with mammals but are dispersible when submersed in water at conditions of elevated temperature, elevated pH, and during a single commercial laundry cycle. The articles solve both the problem of solid waste disposal prevalent with single use garments and the problem of repeated cleansing and recycling of multiple use garments. Contamination associated with the articles of the invention after their use will be disinfected during the commercial laundry cycle that is utilized to disperse the article.
    Type: Grant
    Filed: December 30, 1994
    Date of Patent: December 5, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gregg A. Patnode, John E. Bruno, Denise R. Rutherford, Walter B. Sandison, Dietmar Schlei