Photosetting impression materials
Patent 5179186 Issued on January 12, 1993. Estimated Expiration Date: 
May 28, 2011. 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.
May 28, 2011. 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 References3891523 InventorsApplicationNo. 706128 filed on 05/28/1991US Classes:528/49, Material contains only one -C-XH,-C-C(=X)-XH or carbon to -NH or HNH group106/35, Dental106/38.2Molds and mold coating compositionsExaminersPrimary: Welsh, Maurice J.Attorney, Agent or FirmForeign Patent References
International ClassC08G 018/30Foreign Application Priority Data1990-06-07 DEAbstractA method of making a dental impression which comprises applying to the structure of which an impression is to be made a special prepolymer. The prepolymer is composed of units of at least one macrodiol, at least one aliphatic polyisocyanate, and an unsaturated monoalcohol as chain terminator, wherein the average functionality of the prepolymer based on the unsaturated groups is >2. | |
