Wallboard bundling tape and method
CA 2088930 C · Owner: National Gypsum Company · Inventors: Syracuse, Raymond G.; Robinette, Joseph R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bundling tape has two rows of perforations extending from one end of the tape to the other; the perforations are arranged inward of and substantially parallel to the edges. first band is formed between one edge and a first row of perforations, and a second band is formed between the other edge and the second row of perforations; between the two rows of perforations is a center band tear strip. The bands have co-planar upper and lower surfaces. The tape also has an additional zipper tape attached to the surface of the center band, and apparatus and methods are described for making this laminated tape. Bundles of material, such as wallboard are, fastened together by adhering the bottom …
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
- Filed February 5, 1993 and granted December 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 2015.
- 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.