Purple membrane preparations having increased holographic diffraction efficiency
CA 2078097 C · Owner: Popp, Andreas · Inventors: Miller, Alfred; Oesterhelt, Dieter; Brauchle, Christoph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Purple membrane preparations have increased holographic diffraction efficiency. The purple membrane preparations have a diffraction efficiency of less than 5 seconds and a resolution of greater than 1,500 lines/mm. The purple membrane preparations are obtainable by adjusting a purple membrane suspension having a photocycle time of at least 10 ms to a pH of between 6 and 11 by means of a buffer adding from 1% to, 10% by weight of a proton donor to this purple membrane suspension, and drying the resultant suspension down to a water content of from 1% to 30% by weight.
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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 September 11, 1992 and granted February 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 2014.
- 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.