Abuse-resistant opioid dosage form
CA 2486095 A1 · Owner: Zeng, Yadi · Inventors: Zeng, Yadi; Kao, Huaihung D.; Howard-Sparks, Michelle
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention pertains to a pharmaceutical dosage form comprising an opioid analgesic and a nontoxic N-methyl-D-aspartate receptor antagonist wherein the pharmaceutical dosage form is substantially free of an opioid antagonist. The nontoxic N-methyl-D-aspartate receptor antagonist is present in an opioid euphoria-inhibiting amount to prevent or discourage abuse.
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 May 13, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 13, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 13, 2025.
- 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.