Process for protecting and repairing plastic and plastic composite materials
CA 2107178 C · Owner: Wu, Yulin · Inventors: Wu, Yulin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process has been developed for treating plastic and plastic composite materials wherein a protective epoxy coating is placed on said material by contacting with a composition comprising an epoxy resin an, effective amount of curing agent for the epoxy resin an alcohol and a, hydrocarbon solvent. In another embodiment the protective epoxy coating, is applied by a process comprising the sequential contacting of the plastic or plastic composite surface with a first hydrocarbon solution comprised of an epoxy resin and a hydrocarbon solvent and a second hydrocarbon solution, comprised of an alcohol a curing agent, and a hydrocarbon solvent.
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 September 28, 1993 and granted December 2, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 28, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 2015.
- 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.