Calender and embossing bowls
CA 2037206 A1 · Owner: Howard, Terence G. · Inventors: Howard, Terence G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A calender bowl comprises a central elongate shaft having a flange at each end thereof. This arrangement defines a region which is filled with a filler material. The region to be filled with the filler material is the annular area around the shaft and it is filled by transversely threading numerous disc-shaped sheets of fibre and possibly conducting discs, thereon. Copper rods are disposed within the filler, along all or part of the length of the calender bowl, and lie in thermal contact with the flanges to help dissipate heat.
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
- Filed February 27, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 2013.
- 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.