Utilization of lactones and lactams in the preparation of polyurethane-polyurea products
CA 1279948 C · Owner: Basf Corporation · Inventors: Galan, Robert James; Narayan, Thirumurti
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, Lactones and lactams are utilized in the preparation of urethane modified prepolymers based on diphenylmethane diisocyanate, uretonimine-modified diphenylmethane dilsocyanate. The prepolymers are then employed to prepare microcellular foams suitable for shoe soles and cast polyurethane products.
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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 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 5, 2008.
- 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.