Microbial cellulose wound dressing comprising phmb
CA 2524184 C · Owner: Serafica, Gonzalo · Inventors: Lentz, Kevin E.; Serafica, Gonzalo; Mormino, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a wound dressing comprising a microbial-derived cellulose and aqueous , polyhexamethylene biguanide (PHMB) for use in the treatment of specific types of chronic , wounds, including pressure sores and venous and diabetic ulcers. The wound dressing is capable , of donating liquid to dry substances. The wound dressing is also capable of absorbing exudating , wounds.
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 April 30, 2004 and granted April 1, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 30, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2026.
- 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.