Selas Corporation of America

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5230857 Strip elongation control in continuous annealing furnacesExpiredSep 24, 92Jul 27, 93[C21D]
5174835 Method of strip elongation control in continuous annealing furnacesExpiredNov 20, 90Dec 29, 92[C21D]
4487573 BurnerExpiredAug 10, 82Dec 11, 84[F23D]
4449918 Apparatus for regulating furnace combustionExpiredJul 06, 81May 22, 84[F23N]
4447690 Inductive preheating of upset tubingExpiredDec 28, 81May 08, 84[H05B]
4430057 Calciner screw constructionExpiredFeb 18, 82Feb 07, 84[F26B, B65G, F27D]
4416620 Larger capacity Vortex burnerExpiredJun 08, 81Nov 22, 83[F23D]
4379689 Dual fuel burnerExpiredFeb 13, 81Apr 12, 83[F23M]
4361478 Method of preheating hydrocarbons for thermal crackingExpiredDec 13, 79Nov 30, 82[C10G]
4315486 Floating radiant tube sheets for vertical tube reformers and the likeExpiredJul 30, 80Feb 16, 82[F28F, F22B]
4302193 Reading tutor timerExpiredJan 17, 80Nov 24, 81[G09B]
4289475 Steam vaporization of oilExpiredJan 05, 77Sep 15, 81[F27B, F23D]
4256453 Calciner screw constructionExpiredOct 16, 78Mar 17, 81[F27D]
4239481 Double orifice vortex burner for low or high Wobbe fuelsExpiredJun 19, 78Dec 16, 80[F23D]
4237730 Fluid velocity measurement systemExpiredSep 15, 78Dec 09, 80[G01F]
4237801 Furnace lining or burner cup elementExpiredNov 15, 79Dec 09, 80[F23M]
4221558 Burner for use with oil or gasExpiredFeb 21, 78Sep 09, 80[F23M]
4218213 Thermally conductive partitionExpiredOct 16, 78Aug 19, 80[F27D]
4216183 Method for making furnace liningExpiredAug 22, 75Aug 05, 80[C04B]
4192642 Universal pilot assemblyExpiredApr 17, 78Mar 11, 80[F23Q]

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