Use of aspergillus niger catalase-r for hydrogen peroxide neutralization
CA 2131162 A1 · Owner: Berka, Randy M. · Inventors: Vaha-Vahe, Pekka; Berka, Randy M.; Fowler, Timothy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to the use of catalase-R from Aspergillus niger. Specifically, it has been discovered that catalase-R is superior in performance when compared to commercially available catalase preparations in the neutralization of hydrogen peroxide solutions, particularly contact lens cleaning/disinfecting solutions.
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 March 4, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 4, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 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.