Autoradiogram marking process
CA 1209394 A · Owner: E. I. Du Pont De Nemours And Company · Inventors: Litt, Lloyd C.; Litt, Gerald J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process of forming indicia on autoradiograms is disclosed wherein a substrate containing a distribution of radioactive material, such as radioactively tagged proteins, is marked with a hexagonal Wurtzite form of zinc sulfide doped with trace metals phosphor. The thusly marked substrate is exposed to actinic radiation to charge the phosphor. The substrate is then superposed on an X-ray film to form a latent photographic image in the film which is developed by conventional means to form a photographic image of the phosphorescent indicia and the distribution of radioactive matrial in the substrate.
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
- Granted August 12, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 12, 2003.
- 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.