Toho Ganryo Kogyo Co., Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6139616 Rust-preventive pigment composition and rust-preventive paints containing the sameExpiredMar 30, 99Oct 31, 00[C01B, C09D, C01G, C01F]
5248337 Stable lead chromate pigment composition and process for producing the sameExpiredApr 10, 91Sep 28, 93[C09C]
4334933 Process for preparing stable inorganic pigmentExpiredDec 31, 79Jun 15, 82[C09C]

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