Pitcraft Summit Limited

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4993779 Element to form a rack for a mining machine haulage systemExpiredMar 29, 90Feb 19, 91[F16G, F21C]
4852947 Operating head with phased fluid deliveryExpiredNov 20, 87Aug 01, 89[E21C]
4813748 Mining machinery haulage systemExpiredDec 03, 87Mar 21, 89[E21C]
4754142 Gas detector and mining machineExpiredNov 13, 86Jun 28, 88[G01J]
4281759 ConveyorsExpiredFeb 01, 80Aug 04, 81[B65G, E21C]
4245727 ConduitExpiredMar 14, 79Jan 20, 81[B60M]
4185876 Plural spaced cutter drums on pivotable elongate arm with loading means in the spaceExpiredJun 27, 77Jan 29, 80[E21C]

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