ONODA CEMENT COMPANY, LTD.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5599489 Preparing molded articles of fluorine-containing polymer with increased water-repellencyExpiredMay 25, 95Feb 04, 97[B29C]
5340023 Plasma spraying method and apparatusExpiredAug 25, 92Aug 23, 94[C23C]
5286292 Method of treating fly ash and fly ash cementExpiredJun 26, 92Feb 15, 94[C04B]
5217624 Method for the disposal of aqueous sewage sludgeExpiredJul 22, 92Jun 08, 93[B01D]
5201652 Method of cooling clinker and clinker cooling apparatusExpiredJun 25, 91Apr 13, 93[F27D]
5180257 Straightening instrument and cycloneExpiredDec 14, 90Jan 19, 93[B65G]
5171458 Hot forming mold and method of manufacturing the sameExpiredOct 05, 90Dec 15, 92[B28B]
5160376 Cement setting accelerator and method of manufacturing the sameExpiredOct 15, 90Nov 03, 92[C04B]
5065193 Heat fixing roll for copying machine, method of producing the same and electronic copying machine provided with the sameExpiredMay 18, 90Nov 12, 91[G03G]
5051321 Solid oxide fuel cell and method of manufacturing the sameExpiredJul 24, 90Sep 24, 91[H01M]
5023211 Super-hard ceramicsExpiredAug 21, 90Jun 11, 91[C04B]
4966629 Hot forming mold and method of manufacturing the sameExpiredOct 11, 88Oct 30, 90[B28B, C04B]
4937027 Method of manufacturing corrosion-resistant concrete or mortarExpiredJul 11, 88Jun 26, 90[B29C, C04B, B32B]
4937033 Method of forming protective layer on concrete or mortarExpiredNov 30, 88Jun 26, 90[B28B, B29C]
4844855 Method for producing a centrifugally cast concrete productExpiredOct 16, 87Jul 04, 89[B28B, C04B]
4816194 Method of destroying a brittle body by hydration expansionExpiredDec 19, 85Mar 28, 89[A61C]
4805069 Powder charging apparatus and electrostatic powder painting apparatusExpiredMar 06, 87Feb 14, 89[B05B]
4780180 Nonflammable paperExpiredDec 15, 87Oct 25, 88[D21H]
4755491 Manufacturing method for an aluminum nitride sintered bodyExpiredFeb 09, 87Jul 05, 88[C04B]
4747731 Automatic powder feeding apparatusExpiredMar 17, 87May 31, 88[B65G]

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