Patents Assigned to Purepac, Inc.
  • Patent number: 5290570
    Abstract: An emulsifier-free lotion suspension of at least one liquid in another liquid, the lotion having high intrinsic stability. The lotion is prepared by combining microscopic particles of soft, porous, frangible polymer material containing at least a first liquid with a second liquid in free form. The amount of free liquid is sufficient to achieve a creamy texture without allowing bouyant movement of the particles. The softness of the particles is sufficient to enable the lotion to leave essentially no visible residue when rubbed onto the skin. The polymer material preferably takes the form of a microporous cellulosic powder.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: March 1, 1994
    Assignee: Purepac, Inc.
    Inventor: Larry D. Nichols
  • Patent number: 5223267
    Abstract: Liquefiable powder compositions are disclosed for the delivery of topical analgesics. In particular, microporous cellulosic powders, such as cellulose acetates or nitrates, are disclosed as high liquid content vehicles for the delivery of liquid analgesic preparations. The resulting powders permit the application of the analgesic preparation by simply rubbing or otherwise applying the formulation onto the skin in such a manner that the powder liquefies and appears to vanish. Upon application, the frangible liquid loaded cellulosic powders break up into minute particles that do not pass easily beyond the initial layers of the skin, but do permit the slow release of the analgesic agent for absorption into the skin.
    Type: Grant
    Filed: April 14, 1992
    Date of Patent: June 29, 1993
    Assignee: Purepac, Inc.
    Inventor: Larry D. Nichols
  • Patent number: 5223251
    Abstract: Liquefiable powder compositions are disclosed for the delivery of fragrances. In particular, microporous cellulosic powders, such as cellulose acetates or nitrates, are disclosed as high liquid content vehicles for the delivery of fragrance preparations dissolved or dispersed in a liquid carrier. The resulting powders permit the application of the fragrance preparations by simply rubbing or otherwise applying the formulation onto the skin in such a manner that the powder liquefies and appears to vanish. Upon application, the frangible liquid loaded cellulosic powders break up into minute particles that do not pass easily beyond the initial layers of the skin, but do permit the slow release of the fragrance agent.
    Type: Grant
    Filed: April 24, 1992
    Date of Patent: June 29, 1993
    Assignee: Purepac, Inc.
    Inventor: Larry D. Nichols