Water soluble glass composition
CA 2333687 C · Owner: Tyco Healthcare Group Lp · Inventors: Healy, David Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition for a water soluble glass is described. The composition is unusual in that it contains no or very small quantities (up to 5 mole %) of alkali earth metal compounds. The composition typically comprises P2O5: 40 to 60 mole %; B2O3: 0 to 10 mole %; Na2O: 30 to 40 mole %; K2O: 5 to 10 mole %; Ag2O: 0 to 5 mole %; and up to a total of 5 mole % of other compounds such as CaO, MgO etc. The composition is especially suitable for processing into water soluble glass fibres or wool since the melting point is very low usually less , than 350 ~C.
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 May 27, 1999 and granted July 19, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 27, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2021.
- 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.