Enamel compositions
CA 2037372 A1 · Owner: Kuchinski, Frank A. · Inventors: Labant, Cynthia J.; Sproson, Derek W.; Saad, Elie E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fluorine-free frit composition containing a high content of boron oxide and a relatively low amount of titanium oxide is provided. In a preferred embodiment, the composition contains a small amount of cobalt oxide. The composition is suitable for the preparation of frits which may be applied by either the dry and wet methods of application to obtain enamel cover coats. In particular, the frit is suitable for use in the electrostatic method of frit application on steel substrates. The composition of the invention is particularly suitable in "two coat-one fire" applications. The enamel produced from the frit of the invention is characterized by its virtual freedom from pitting, relatively …
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 February 28, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 28, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 2013.
- 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.