Modified latex
CA 2175240 C · Owner: Houlberg, Vibeke Kobs · Inventors: Kroyer, Karl Kristian Kobs (Deceased)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is disclosed for the use of a modified latex making it possible to provide a combination of hydrogene bonds and covalent bonds in fibrous products. A softener product is added to the binder solution before its application onto the fibrous product. The softener is a natural latex added to a latex binder contained in a water suspension. It has surprisingly shown that a product manufactured with a modified latex will occur more soft and silky and also stronger than products made by use of a normal latex binder. The modified latex is especially suitable for use in a process in which a mechanical softening treatment is effected on the fibrous product.
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 October 28, 1994 and granted February 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2016.
- 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.