PRIMAXIS CORPORATION, 5717 ARAPAHOE AVENUE, BUILDING 3, BOULDER, COLORADO 80303, A COLORADO CORP.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4838741 Method for making an epicyclic speed reducer with two stage integral rotorExpiredMay 01, 87Jun 13, 89[B24B, B23C]
4658675 Epicyclic transmission utilizing sets of races having differential clearancesExpiredFeb 10, 84Apr 21, 87[F16H]
4643047 Speed reducing gearing mechanism employing trochoidally formed gear surfaces for rolling torque transmissionExpiredOct 20, 81Feb 17, 87[F16H]
4620456 Nutating drive mechanisms having spherical ball driving elementsExpiredOct 18, 82Nov 04, 86[F16H]
4620457 Nutating drive mechanisms having roller driving elementsExpiredOct 18, 82Nov 04, 86[F16H]
4604916 Epicyclic transmission having cam driven roller retainerExpiredFeb 10, 84Aug 12, 86[F16H]
4584904 Epicyclic transmission having free rolling roller driving elementsExpiredMar 26, 82Apr 29, 86[F16H]
4554846 Two-piece retainer for epicyclic transmissionsExpiredFeb 10, 84Nov 26, 85[F16H]
4553451 Pin controlled retainer for epicyclic transmissionExpiredFeb 10, 84Nov 19, 85[F16H]
4552037 Retainer for epicyclic transmissionExpiredFeb 10, 84Nov 12, 85[F16H]
4446752 Epicycloidal gears and gear tooth arrangement thereforExpiredApr 23, 81May 08, 84[F16H]

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