Impregnant compositions for porous articles
Patent 5017669 Issued on May 21, 1991. Estimated Expiration Date: 
June 9, 2009. 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.
June 9, 2009. 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 References Re32240 Self-emulsifying anaerobic composition Patent #: 4069378 InventorApplicationNo. 368371 filed on 06/09/1989US Classes:526/320, Ether or hydroxy containing526/90, Material contains transition metal or compound thereof526/212Alcohol contains a single hydroxy group or is alcoholate thereofExaminersPrimary: Schofer, Joseph L.Assistant: Sarofim, N. Attorney, Agent or FirmForeign Patent References
International ClassC08F 020/26Foreign Application Priority Data1986-12-16 GBAbstractThe sealing of small porous rigid articles by impregnation with a liquid synthetic resin impregnant and sequent curing of resin in the pores and provides a liquid (meth)acrylic ester impregnant composition comprising a free radical catalyst, an inhibitor and a higher alkyl (meth)acrylic ester and/or polyfunctional (meth)acrylic ester which has been obtained by transesterification in the presence of an organotitanium catalyst and from which the catalyst residue has not been removed. The catalyst residue has been found to improve sealing and thermal stability of the cured impregnant. | |
