×

Encapsulation of biological material

  • US 4,352,883 A
  • Filed: 03/28/1979
  • Issued: 10/05/1982
  • Est. Priority Date: 03/28/1979
  • Status: Expired due to Term
First Claim
Patent Images

1. A process for encapsulating viable tissue within a semipermeable membrane, said process comprising the steps of:

  • A. suspending finely divided living tissue in an aqueous medium which is physiologically compatible with the tissue and which contains a water soluble substance which(a) is physiologically compatible with the tissue;

    and(b) can be reversibly gelled to form a coherent, shape-retaining mass;

    B. forming the suspension into droplets of a size sufficient to envelop tissue;

    C. gelling the droplets to form discrete, shape-retaining temporary capsules;

    D. forming a permanent semipermeable membrane about the temporary capsules; and

    E. reliquifying the gel within the membrane.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×