Pvc - red mud compositions
CA 1111982 A · Owner: Industrial Technology Research Institute · Inventors: Hsu, Wei W.; Hao, Paul L.C.; Tang, Horng S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to the production of a plastic material from new or waste polyvinylchloride (PVC) compounds with waste red-mud. The compositions may preferably also contain used machine lubricating, oil. The degradation products in the PVC are neutralized by the free alkalies in the red-mud. The plastic material may also contain other additives such as fillers and, plasticizers to obtain desired physical properties.
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 November 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 1998.
- 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.