Screw-threaded acetabular component of hip joint prosthesis
CA 1320796 C · Owner: Minnesota Mining And Manufacturing Company · Inventors: Shelley, Philip
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure SCREW-THREADED ACETABULAR COMPONENT OF HIP JOINT PROSTHESIS, An acetabular implant of a hip joint prosthesis comprising a metal cup shell (2) having an external self-tapping thread extending around the circumference of the shell. The thread is divided into a plurality of segments (8,10) by a plurality of tapping grooves (16). The thread radius (Ra, Rb, Rc, Rd) of the thread segments (8 10) progressively decreases from the leading end (12) to the trailing end (14) of a segment (8 or 10). The tapping grooves (16) are preferably arranged in pairs dividing the thread into alternating long (8) and short (10) segments. The construction of the thread reduces the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 3, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 3, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.