GULF & WESTERN MANUFACTURING COMPANY

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4659670 Biological desulfurization of coalExpiredMay 18, 83Apr 21, 87[C12P, C12N, C10G, D06M]
4654646 Modular liquid level sensor having integral electronicsExpiredFeb 22, 85Mar 31, 87[G08B, B60Q]
4609913 Fluid level sensorExpiredFeb 22, 85Sep 02, 86[G08B]
4599936 Integral strut and piston groove protectorExpiredApr 22, 85Jul 15, 86[F16J]
4591839 System for detecting low liquid level and probe thereforExpiredDec 05, 84May 27, 86[G08B]
4570118 Angular position transducer including permanent magnets and Hall Effect deviceExpiredNov 20, 81Feb 11, 86[G01B, G01R]
4470733 Multiple function cutting toolExpiredAug 06, 82Sep 11, 84[B23C]
4431884 Snap action switchExpiredAug 09, 82Feb 14, 84[H01H]
4421214 System for automatically releasing parking brakesExpiredDec 16, 80Dec 20, 83[B60K]
4406995 Base station for monitoring call boxesExpiredMay 12, 81Sep 27, 83[G08B]
4400672 Relay mounting deviceExpiredAug 27, 81Aug 23, 83[H01H]
4358293 Coal-aqueous mixturesExpiredJan 29, 81Nov 09, 82[C10L]
D266351 Multidirectional welding outletExpiredMay 19, 80Sep 28, 82[D230]
4347126 Apparatus and method for flotation separation utilizing a spray nozzleExpiredJan 29, 81Aug 31, 82[B03D]
4347127 Apparatus and method for froth flotation separation of the components of a slurryExpiredJan 29, 81Aug 31, 82[B03D]
4340327 Tool support and drilling toolExpiredJul 01, 80Jul 20, 82[B23B]
4306883 Process for forming coal-oil mixtures under selected conditions of temperature and shearExpiredJan 29, 81Dec 22, 81[C10L]
D259092 Tap and die wrenchExpiredAug 22, 77May 05, 81[D080]
D255211 Tap and die wrenchExpiredAug 22, 77Jun 03, 80[D080]
4194383 Modular transducer assembly for rolling mill roll adjustment mechanismExpiredJun 22, 78Mar 25, 80[B21B]

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