Electrostatically spun fibre of a polymer material
CA 1165523 A · Owner: Carl Freudenberg · Inventors: Schmidt, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The material used in this fibre has a molecular structure that is amorphous or partially oriented, in which connection the surface structure is a component of a foamed layer that surrounds a fibre core that is in the, main, free of pores. The pores are oriented perpendicular to the surface and at a diameter of 0.01-0.5 microns their cross-section covers 1 99% of the total surface.
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 April 17, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 17, 2001.
- 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.