Patents Assigned to PCR Research Chemicals, Inc.
  • Ring substituted crown ethers and method of producing same
    Patent number: 4421923
    Abstract: There is provided a new class of crown ethers characterized by an --OH functional group attached to a carbon atom in the heterocyclic ether ring portion and derivatives thereof. A novel process for making such crown ethers is also provided which is characterized by reacting a bisphenol ether with an epihalohydrin to effect ring closure and provide the appendant --OH group.These products are especially useful as complexing agents.
    Type: Grant
    Filed: December 12, 1980
    Date of Patent: December 20, 1983
    Assignee: PCR Research Chemicals, Inc.
    Inventor: Richard A. Bartsch