Improved spiral fabrics
CA 2590640 C · Owner: Billings, Alan L. · Inventors: Billings, Alan L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A spiral-link fabric (10) for use in a papermaking machine or the like having wide spiral coils , that make the fabric easier to form and allow for versatility in selecting stuffers. Such stuffer , inserts may be formed of softer more flexible and less expensive materials which may make , the fabric more flexible and less diagonally stiff or may selected to obtain , desired , permeability or permeability profiles for the fabric. The spiral-link fabric may include a , plurality of spiral coils (12 14) arranged in a predetermined manner such that adjacent ones , of side-by-side spiral coils are interdigitated with each other so as to form a channel (26) and , interconnected by a pintle …
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 November 21, 2005 and granted January 21, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 21, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.