Purified mite allergen
CA 2010177 C · Owner: Wada, Takeshi · Inventors: Shigeta, Seiko; Oka, Satoru; Ono, Kazuhisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New purified mite allergens having the following properties:, 1 being contained in fecal extracts of mites in culture; 2 glycoprotein containing more than about 70% sugar; 3 a weight-average molecular weight: 70,000 to 80,000 (as determined by the sedimentation equilibrium method); and 4 possessing allergen activity. or, 1 being contained in fecal extracts of mites in culture; 2 glycoprotein containing more than about 40% sugar; 3 a molecular weight: 1,500 to 5,000 (as determined by the Sephadex G25 gel filtration method); and 4 possessing allergen activity. The above purified mite allergens are useful as a pharmaceutical and a diagnostic composition for mite allergic diseases.
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 February 15, 1990 and granted March 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 2012.
- 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.