Carbonless manifold business forms
CA 1093602 A · Owner: Moore Business Forms, Inc. · Inventors: Sornberger, G. Russell
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A set of manifold business forms includes at least three plies having selected mating surfaces coated with chemicals which are capable of reacting with one another to produce a colored mark An intermediate ply of the set is of tissue material having its back surface coated with a color precursor in the form of a microencapsulated liquid and the bottom ply of the, set is of an opaque material having its front surface coated with a composition of a generally solid record-developing material. The top ply of the set is likewise of an opaque material so that upon the application of pressure to, the set an image is developed on the top surface of the bottom ply. The use of a coated-back tissue …
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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 January 13, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 13, 1998.
- 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.