Toyotomi Kogyo Co., Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5087195 Combustion cylinder structure for oil burnerExpiredOct 27, 89Feb 11, 92[F23D]
5030085 Wick operating structure of lever actuation type for oil burnerExpiredJul 26, 89Jul 09, 91[F23N]
D314816 Oil-fired space heaterExpiredOct 10, 85Feb 19, 91[]
D310408 Oil fired space heaterExpiredFeb 18, 88Sep 04, 90[]
4921166 Hot water circulating systemExpiredJul 29, 88May 01, 90[F24D]
4915296 Hot water circulating systemExpiredJan 29, 88Apr 10, 90[F24D]
D305260 Electric radiant heaterExpiredNov 25, 87Dec 26, 89[]
4872829 Fire-extinguishing device for oil burnerExpiredFeb 06, 89Oct 10, 89[F23N]
4854858 Oil reservoir for oil burnerExpiredJul 29, 88Aug 08, 89[F23D]
4850855 Combustion cylinder structure for oil burnerExpiredJul 29, 88Jul 25, 89[F23D]
4846672 Combustion cylinder structure for oil burnerExpiredJul 29, 88Jul 11, 89[F23D]
D301163 Oil-fired space heater or similar articleExpiredJan 27, 87May 16, 89[]
4810185 Fire-extinguishing device for oil burnerExpiredFeb 28, 86Mar 07, 89[F23Q]
4805589 Fire-extinguishing device for oil burnerExpiredApr 27, 88Feb 21, 89[F24C]
4797088 Safety device for oil burnerExpiredApr 29, 86Jan 10, 89[F23N]
4790184 Oil gauge for cartridge-type oil tankExpiredJun 12, 87Dec 13, 88[G01F]
4790745 Automatic fire-extinguishing device for oil burnerExpiredMar 30, 87Dec 13, 88[F23N]
D298874 Vacuum cleanerExpiredDec 17, 85Dec 06, 88[]
D298875 Vacuum cleanerExpiredDec 17, 85Dec 06, 88[]
4775437 Process of forming cylinder wall of burning cylinder for use in heating apparatusExpiredJul 26, 85Oct 04, 88[B05D, B44C]

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