Waistband interlining with thin edges and its ultrasonic formation
CA 1305292 C · Owner: Crawford, Warren N. · Inventors: Crawford, Warren N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
18a:Q1-101a:11/13/86:kt (Q1-101a), Filed by Express Mail Label B62238801 on November 13 1986, TITLE: WAISTBAND INTERLINING WITH THIN EDGES AND ITS ULTRASONIC FORMATION, INVENTOR: WARREN N. CRAWFORD ABSTRACT, Waistband interlinings are made by ultrasonically cutting a fabric having warp yarns and fill yarns of a thermoplastics material along lines parallel to the warp threads. An acrylic finish on the fabric permits it to undergo the ultrasonic cutting, will retard the development of brittleness in the fused fibres, and keep the resulting fused edge intact. The fabric should have at least 30 fill yarns per inch but no more than 42 warp yarns per inch. The fabric is cut by passing it between …
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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.
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.