Wound dressing having a cylindrical shape for deep wounds
CA 2109981 C · Owner: Ndm, Inc. · Inventors: Wolf, Michael Lee; Allaire, Michael J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wound dressing capable of being inserted into a deep wound found on a patient is provided. The wound dressing contains a hydrogel material capable of absorbing wound exudate emitted by a deep wound and is substantially in the form of a cylinder. A support layer is mounted within the cylinder for purposes of providing support for the hydrogel material in the wound dressing. The invention also provides a syringe for inserting and removing the wound dressing from the deep wound for which it is applicable.
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 November 25, 1993 and granted July 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 25, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 2015.
- 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.