Kabushiki Kaisha Ohara Kogaku Garasu Seizosho

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4591373 Method for molding high-precision glass productsExpiredDec 14, 84May 27, 86[C03B]
4501819 Glass for a photomaskExpiredDec 15, 83Feb 26, 85[C03C]
4358543 Fluoride glassExpiredSep 18, 80Nov 09, 82[C03C]
4249927 Method and apparatus for manufacturing glass products by controlling free flow of low viscosity molten glassExpiredAug 01, 79Feb 10, 81[C03B]
4226627 Optical glassExpiredJun 13, 79Oct 07, 80[C03C]

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