Process for producing crystalline I-type oxytitanium phthalocyanine

United States Patent im

Iuchi et al.

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US005530115A [ii] Patent Number: 5,530,115 [45] Date of Patent: Jun. 25, 1996

[54] PROCESS FOR PRODUCING CRYSTALLINE I-TYPE OXYTITANIUM PHTHALOCYANINE

[75] Inventors: Kazushi Iuchi; Hajime Miyazaki;

Hideyuki Takai; Itaru Yamazaki, all

of Yokohama, Japan

[73] Assignee: Canon Kabushiki Kaisha, Tokyo, Japan

[21] Appl. No.: 386,346

[22] Filed: Feb. 10,1995

Related U.S. Application Data

[63] Continuation of Ser. No. 255,817, Jun. 7, 1994, abandoned, which is a continuation of Ser. No. 115,264, Sep. 2, 1993, abandoned, which is a continuation of Ser. No. 622,837, Dec. 5, 1990, abandoned.

[30] Foreign Application Priority Data

Dec. 8, 1989 [JP] Japan 1-319934

Dec. 8, 1989 [JP] Japan 1-319935

[51] Int. CI.6 C09B 67/50

[52] U.S. CI 540/141

[58] Field of Search 540/141

[56] References Cited

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Primary Examiner—Mark L. Berch

Attorney, Agent, or Firm—Fitzpatrick, Cella, Harper &

Scinto

384470 8/1990 European Pat. Off.

540/141

7 Claims, 8 Drawing Sheets