Liquid radiation-curable formulation, in particular for use in stereolithography
CA 2117572 C · Owner: Hunziker, Max · Inventors: Hunziker, Max; Steinmann, Bettina; Wolf, Jean-Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Liquid radiation-curable formation, in particular for stereolithography based on at least, one compound that contains radically polymerisable groups and at least one photoinitiator, suitable for the polymerisation which formulation additionally contains a polyoxyalkylenepolysiloxane block copolymer that is selected from copolymers of the chemical formulae, (I): R1-(OCcH2c)d-{T-(CcH2cO)d-l-(CcH2c)}-OR1 (see fig. I), and, (see fig. II), wherein: R1 is a hydrogen atom or a C1-C8alkyl group; R2 is a methyl or phenyl group;, T is a polysiloxane group PS terminated as described in the specification in more detail;, PS is the group of formula (see fig. III) and Alk is an alkylene group of 3 to 10 …
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 August 24, 1994 and granted October 13, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 24, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 24, 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.