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Expired Canadian patentCanada

Process for manufacturing a safety glass for motor vehicles and buildings, and product so obtained

CA 1305446 C · Owner: Capriotti, Luigi · Inventors: Sebastiano, Francesco; Capriotti, Luigi

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The invention relates to a manufactured article formed of two transparent layers, preferably one made of glass and the other made of plastic, adapted to be used as glazing for motor vehicle windows and buildings consisting of a, glass substrate onto which is applied a single-layer plastic comprising a composition of polycaprolactones a, vinyl monomer N-vinyl-2-pyrrolidone mono-, di-, tri-, tetra-acrylic monomers a photoinitiator, and flow control, agents reaction catalysts, solvents, plasticizers and adhesion promoters, and aliphatic polyisocyanate which, composition is distributed as a liquid with uniform thickness over the surface, which is spun and exposed to ultraviolet radiations to …

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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

  • Granted July 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 3, 1987
GrantedJuly 21, 1992
Term endedJuly 21, 2009
Patent numberCA 1305446 C
Classification (IPC)B32B17/10 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedFeb 3, 1987Patent grantedJuly 21, 1992Term endedJuly 21, 2009

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.