Developer compositions comprising two incompatible resins with interacting polar groups
CA 1183033 A · Owner: Rank Xerox Limited · Inventors: Takashima, Koichi; Matsui, Izuru; Hashimoto, Ken
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A developer composition is disclosed which is characterized by containing two binding resinous materials (A) and (B). The material (A) is a resinous material having a polar functional group and a glass transition temperature below 0°C. The material (B) is a resinous material having a glass transition temperature higher than 40°C. The material (B) is incompatible with the material (A). Material (B) has a polar functional group capable of interacting with the polar functional group of material (A). The developer may also contain a fine magnetic powder in an amount of 20 to 80% by weight based on the total weight of the developer composition. The developer composition can be used to form clear …
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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 February 26, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 26, 2002.
- 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
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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.