Forming unitary articles of two different thermoplastic materials
CA 1136813 A · Owner: Leveen, Harry H. · Inventors: Leveen, Harry H.; Leveen, Robert F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Articles having portions of materials with different properties are integrally formed by injection of two different thermoplastic materials simultaneously through separate gates into the same mold wherein the materials fuse or bond together. A plunger for a syringe formed by the process has a rigid shaft and an elastomeric head.
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 December 7, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 7, 1999.
- 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.