Dihydroperimidine squarylium dyes as antihalation and acutance materials for photographic and photothermographic articles

U.S. Patent Number: 5380635

Abstract: Dihydroperimidine squarylium dyes have been found to be particularly effective when used in acutance and antihalation systems for photothermographic and photographic articles.

Inventors: Gomez; Charles W. (Cottage Grove, MN), Harring; Lori S. (Woodbury, MN), Helland; Randall H. (Lake Elmo, MN), Ramsden; William D. (Afton, MN), Van Thien; Tran (Harlow, GB2)

Assignee: Minnesota Mining and Manufacturing Company (St. Paul, MN)

Application Number: 08/203,120

Issued: 1995-01-10

Expired: 2007-01-10

Classes: 430/517 ; 430/444; 430/510; 544/249

Field of search: 430/517,510,573,944

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