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Expired Canadian patentCanada

Camouflaged composite pressure-sensitive adhesive tape

CA 1319641 C · Owner: Minnesota Mining And Manufacturing Company · Inventors: Vesley, George F.

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

Abstract of the Disclosure A pressure-sensitive adhesive tape having a camouflaged appearance has a cellular or foamlike pressure-sensitive core layer and at least one relatively thin, dense, pigmented pressure-sensitive adhesive surface layer. The thickness of the core layer may be about 1.0 mm and that of a surface layer about 0.03 mm. The surface layer of such a composite tape appears to be more intense in color than does either the core layer or the surface layer by itself. When viewed edgewise, the composite tape appears to present a color that is more intense than one would expect from viewing the edges of the core layer and surface layer by themselves.

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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 June 29, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 29, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 26, 1987
GrantedJune 29, 1993
Term endedJune 29, 2010
Patent numberCA 1319641 C
Classification (IPC)C09J7/02 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedNov 26, 1987Patent grantedJune 29, 1993Term endedJune 29, 2010

Sources & verification

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