High stalk blown film extrusion apparatus and method
CA 1255063 A · Owner: Cerisano, Frank D. · Inventors: Cerisano, Frank D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high stalk blown film extrusion apparatus and method is described which produces a stabilized high stalk for increasing the production rate of blown low to high, molecular weight polymers while increasing the film's, physical and mechanical properties. The high stalk is stabilized by application of high velocity low volume, flow rate of air over the interior and exterior surfaces of the extruded film.
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 June 6, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 6, 2006.
- 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.