Releasably bound active materials
CA 2044841 A1 · Owner: Newton, John M. · Inventors: Macduff, Malcolm G. J.; Newton, John M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case7547/7601(2), ABSTRACT OF THE DISCLOSURE RELEASABLY BOUND ACTIVE MATERIALS, This invention relates to a process for binding water-sensitive active materials by forming a dough from a formulation which has the active material and an organophilic clay binder in particulate form using a non-aqueous liquid medium, shaping the dough and drying the shapes so formed. The granules so formed are releasably bound in the clay and the active species is released when the granules come into contact with water. The process of this invention is particularly suited to granulation of water-sensitive bleaches and bleach activators used in powder detergent formulations.
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 June 18, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 2013.
- 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.