Method and apparatus for forming an irregular pattern of granules on an asphalt coated sheet
CA 2269206 A1 · Owner: Belt, James S. · Inventors: Wilgus, Frank A.; Wilgus, Frank R.; Belt, James S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method of forming an irregular pattern of granules (15) on an asphalt coated sheet (13), a flow of granules (15) is discharged toward the sheet (13). The granules (15) are deflected onto the sheet (13) with a deflector (17) having an irregular surface (46) to form a granule deposit (20) having an irregular pattern. In one embodiment of the method the deflected granules , (15) are controlled with a shield (90 103). Apparatus for forming an , irregular pattern of granules (15) on an asphalt coated sheet (13) includes a granule applicator (14) for discharging a flow of granules (15) a deflector , (17) having an irregular surface (46) for deflecting the granules (15) and , optionally …
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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
- Filed December 17, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2019.
- 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.