Polycyclic unsaturated ethers and esters
Patent 4847388 Issued on July 11, 1989. Estimated Expiration Date: 
September 16, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 16, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesProcess for the manufacture of crosslinked polymers which contain imide groups Alkenylphenyl substituted acrylates or methacrylates Patent #: 4468524 InventorAssigneeApplicationNo. 07/245433 filed on 09/16/1988US Classes:549/410, Chalcogen of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens, bonded directly to the carbocyclic ring of the bicyclo ring system (e.g., tocopherol esters, etc.)540/543, Spiro544/230, Spiro544/6, Spiro544/70, Spiro546/15, Spiro548/147, Spiro548/216SpiroExaminersPrimary: Ivy, C. WarrenAssistant: Walker, Alex H. International ClassesC07D 487/00 (20060101)C07D 487/10 (20060101) AbstractA novel class of unsaturated polycyclic ethers and esters comprises unsaturated ether and ester derivatives of a hydroxyaryl-substituted [4.4] spirodilactams having nitrogen atoms in the 1- and 6-positions of the spiro ring system and having the hydroxyaryl groups attached to each spiro ring nitrogen. Such unsaturated ethers and esters react with conventional curing agents to produce cured, insoluble products having high glass transition temperatures. |
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