SHEFFER COLLET COMPANY

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4591171 Seal for air charging a chuckExpiredMar 02, 84May 27, 86[B23B]
4422653 Chuck for tubular workpiecesExpiredApr 16, 82Dec 27, 83[B23B]
4422655 Chuck with improved jaw actuator support structureExpiredAug 24, 81Dec 27, 83[B23B, B25G]
4355816 Double acting internal diameter gripping chucksExpiredJun 30, 80Oct 26, 82[B23B]
4236722 Double acting cam operated chuck colletExpiredMay 16, 79Dec 02, 80[B23B]
4206932 Diaphragm chuck with locking ringExpiredFeb 28, 79Jun 10, 80[B23B]

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