Acid lyophilised pharmaceutical formulation of tissue plasminogen activator
CA 1300008 C · Owner: Johnston, Michael D. · Inventors: Berger, Henry; Johnston, Michael D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lyophilised pharmaceutical formulation of tissue plasminogen activator and a process for its preparation by vacuum drying a frozen aqueous solution thereof, in which the pH is from 2 to 5; the lyophilised formulation has improved solubility in aqueous solution as compared with prior lyophilised formulations of tissue plasminogen activator, and thus capable of producing a parenteral solution of high t-PA concentration without substantial risk of precipitation; such parenteral solutions of t-PA are useful in dissolving blood clots.
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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 May 5, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 5, 2009.
- 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.