Urethane elastomer for printing belts
CA 1208232 A · Owner: Dataproducts Corporation · Inventors: Slagel, Edwin C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for making an elastomer for use in printing/drive belts is disclosed wherein a mixture of approximately 2 equivalents of toluene diisocyanate consisting of about 88 wt.% of the 2,4 isomer and 12 wt.% of the 2,6 isomer is reacted with a polyether or polyester having difunctional primary hydroxyl groups to form a prepolymer. The prepolymer is then reacted with a diamine curing agent to form the elastomer.
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 July 22, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 22, 2003.
- 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.