Prevention of shipworm infestation of wooden marine structures
CA 1073687 A · Owner: E.I. Du Pont De Nemours And Company · Inventors: Partridge, Walter E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved method is provided for solving the age-old problem of wood-boring marine organisms. Wooden structures which are exposed to sea water can be protected from shipworm infestation by surrounding the structure with a porous nonwoven fabric. consisting essentially of polypropylene fibers and having an effective pore size of less than 200 microns. The fabric is light-weight and has high tensile and tear strengths and good puncture resistance. The method can be used on new structures or old ones that have already become infested with marine woodborers.
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 March 18, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 18, 1997.
- 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.