Debridement sponge
CA 2087674 C · Owner: Mcneil-Ppc, Inc. · Inventors: Butterworth, David E.; Dyer, John; Kennette, John W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A debridement sponge made from a nonwoven fabric comprising, in a preferred form, yarn-like strands of bleached cotton fibers. Tn the preferred form the, strands are interconnected at multiple junctures to form fewer than 31 generally rectangular apertures per cm2. Moreover each aperture has an area of 1.3 mm2. Furthermore the fabric has a Calculated Strand Density of 0.17 g/cc, a Clarity Index of at least 0.75 and an, Absorbent Capacity of at least 7 grams of a colored aqueous, saline solution per gram of the fabric when compressed under a pressure of 3.3 g/cm2. Plug Harshness and Compression Recovery of the fabric are excellent.
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 January 20, 1993 and granted August 19, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 20, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 20, 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.