REED ROCK BIT COMPANY

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4556424 Cermets having transformation-toughening properties and method of heat-treating to improve such propertiesExpiredOct 13, 83Dec 03, 85[C22C]
4514097 Friction bearing assembly having a series of rings constituting a bushing thereforExpiredSep 22, 82Apr 30, 85[F16C]
4495840 Bit breakerExpiredJul 15, 83Jan 29, 85[B25B]
4466622 Compound dynamic seal for rolling cutter drill bitExpiredSep 20, 82Aug 21, 84[F16J]
4427221 Drill bit nozzle retention and alignment systemExpiredOct 13, 81Jan 24, 84[F16L]
4420050 Oil well drilling bitExpiredMay 18, 81Dec 13, 83[E21B]
4417629 Drill bit and method of manufactureExpiredMay 13, 81Nov 29, 83[B21K, E21B]
4412590 Rock bit internal lubricant pumpExpiredJan 23, 81Nov 01, 83[E21B]
4398952 Methods of manufacturing gradient composite metallic structuresExpiredSep 10, 80Aug 16, 83[B22F]
4381824 Drill bit lubrication systemExpiredOct 03, 80May 03, 83[E21B]
4372402 Combination fluid nozzle and backflow valveExpiredOct 21, 81Feb 08, 83[E21B]
4372404 Cutting teeth for rolling cutter drill bitExpiredSep 10, 80Feb 08, 83[E21B]
4369849 Large diameter oil well drilling bitExpiredJun 05, 80Jan 25, 83[E21B]
4368788 Metal cutting tools utilizing gradient compositesExpiredSep 10, 80Jan 18, 83[E21B]
4356034 Method of reducing defects in powder metallurgy tungsten carbide elementsExpiredSep 10, 80Oct 26, 82[B22F]
4334586 Inserts for drilling bitsExpiredJun 05, 80Jun 15, 82[E21B]
4323284 Thrust face bearing structure for rolling cutter drill bitExpiredOct 17, 80Apr 06, 82[F16C]
4306727 Dynamic seal for rolling cutter drill bitExpiredJul 24, 80Dec 22, 81[E21B, F16J]

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