Article and method for preserving an archival article
CA 2092518 C · Owner: Hollinger, William K. Jr. · Inventors: Hollinger, William K. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A preservation article for the preservation of an archival article which involves an alkaline buffer and an adsorbent. A method of preserving an archival article which involves providing a preservation article in proximity to an archival article, wherein the preservation article includes an alkaline buffer and an adsorbent. The preservation article may be coated on or incorporated into a container, a packaging material a, support for an archival article or the archival article itself.
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 25, 1993 and granted January 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 25, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 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.