United States Patent (19) 11 Patent Number: 6,015,838 Stern Et Al
US006015838A United States Patent (19) 11 Patent Number: 6,015,838 Stern et al. (45) Date of Patent: *Jan. 18, 2000 54 AQUEOUS FILM-FORMING FOAM 4,555,556 11/1985 Beresniewicz .......................... 526/212 COMPOSITIONS 4,576,869 3/1986 Malholtra ... ... 428/502 4,749,526 6/1988 Flynn ....... ... 562/849 (75) Inventors: Richard M. Stern, Woodbury; 5,085,786 2/1992 Alm et al. .............................. 252/8.05 Wei-Qiang Fan, Cottage Grove, both of 5,144,469 9/1992 Stern et al. ............................. 562/556 Minn. 5,266,639 11/1993 Chapman, Jr. et al. ................ 525/200 5,362.919 11/1994 Costello et al. ........................ 568/601 5,488,142 1/1996 Fall et al. ................................ 560/227 73) Assignee: 3M Innovative Properties Company, 5,506,309 4/1996 Bierschenk et al. .................... 525/410 St. Paul, Minn. 5,539,059 7/1996 Bierschenk et al. ... ... 525/331.6 5,756,000 5/1998 Hansen et al. .............................. 252/3 Notice: This patent issued on a continued pros ecution application filed under 37 CFR FOREIGN PATENT DOCUMENTS 1.53(d), and is subject to the twenty year 0 267 828 5/1988 European Pat. Off. ........ CO7C 53/21 patent term provisions of 35 U.S.C. 0.375 610 6/1990 European Pat. Off. ........ CO7H 15/14 154(a)(2). 2015 296 4/1970 France .............................. CO8F 1/OO This patent is Subject to a terminal dis 1216 116 5/1966 Germany. claimer. 1812 531 6/1970 Germany ......................... A62D 1/OO 1632714 3/1991 U.S.S.R. 1092141 11/1967 United Kingdom ............ CO7C 53/34 Appl.
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