Method and apparatus for making blow molded generally tire shaped articles
CA 1086465 A · Owner: W.R. Grace & Co.-Conn. · Inventors: Olcott, Tyler K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tire shaped article is blow molded by extruding a tubular parison between movable mold sections, sealing the open end of the parison, injecting air into the parison moving a lower mold section, and the bottom portion of the parison upwardly and expanding an intermediate portion of the parison radially outwardly into a mold cavity.
Read the whole patent
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 September 30, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 30, 1997.
- 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.