Patents by Inventor Dolores Rodriguez-Sanchez

Dolores Rodriguez-Sanchez 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).

  • Encapsulated active material system
    Patent number: 4749620
    Abstract: Capsules are formed herein a liquified core while avoiding capsule core gelation by adding drops of a solution of either an anionic polymer composition or a cationic polymer composition to a solution of an ionic polymer of opposite charge. The drops contain an active ingredient such as a cell or microorganism capable of producing a biologically active product or can contain a biological or chemical composition. The interface of the ionic polymers form a permeable membrane surrounding the liquid drops.
    Type: Grant
    Filed: September 18, 1985
    Date of Patent: June 7, 1988
    Assignee: Massachusetts Institute of Technology
    Inventors: ChoKyun Rha, Dolores Rodriguez-Sanchez
  • Process for encapsulation and encapsulated active material system
    Patent number: 4744933
    Abstract: Capsules are formed herein a liquified core while avoiding capsule core gelation by adding drops of a solution of either an anionic polymer composition or a cationic polymer composition to a solution of an ionic polymer of opposite charge. The drops contain an active ingredient such as a cell or microorganism capable of producing a biologically active product or can contain a biological or chemical composition. The interface of the ionic polymers form a permeable membrane surrounding the liquid drops.
    Type: Grant
    Filed: August 16, 1985
    Date of Patent: May 17, 1988
    Assignee: Massachusetts Institute of Technology
    Inventors: ChoKyun Rha, Dolores Rodriguez-Sanchez