Building roof insulation
CA 1047218 A · Owner: Butler Manufacturing Company · Inventors: Bellem, Norman A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure Insulation for the roof of a building. The insulation comprises a plurality of distinct layers of flexible insulation blankets with a spacer channel member interposed therebetween. A spacer block can be included to space the top layer of insulation from a roof panel at a location adjacent a purlin. The spacer member is channel-like and is generally U-shaped in transverse cross-section and is adaptable to be used in conjunction with a variety of purlin shapes.
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
- Granted January 30, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 30, 1996.
- 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.