Process for producing composite preparation containing nucleic acid
CA 2333162 C · Owner: Seki, Junzo · Inventors: Hirabayashi, Kazuko; Seki, Junzo; Sugihara, Katsuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing a homogeneous nucleic-acid-containing composite preparation of good quality which is capable of sterilization by filtration and is characterized by containing no coarse particles having a size of 7 µm or larger, which are regarded as unsafe for the human body. The process for producing the preparation, containing a composite of a cationic carrier with a nucleic acid polymer, is characterized in that two single-stranded nucleic acid polymers capable of at least partly forming a double-stranded state are separately added, each in the single-stranded state to either a , cationic carrier or a material from which the cationic carrier is to be formed, and all these …
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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
- Filed May 24, 1999 and granted July 26, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 24, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 24, 2021.
- 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.