Biodegradable particle coatings having a protein convalently immobilized by a crosslinking agent
CA 2095148 A1 · Owner: Burshteyn, Alexander · Inventors: Siiman, Olavi; Gupta, Ravinder K.; Burshteyn, Alexander
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates generally to colloidal particles having a crosslinked coating with pendent functional groups attached thereto. Magnetic and non-magnetic particles have a biodegradable crosslinked gelatin coating to which is covalently attached pendent biological substances or molecules, especially monoclonal antibodies. The monoclonal antibodies so attached are useful in a variety of positive and negative biological assays.
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 October 25, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 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.