Hollow porous-wall glass microspheres for hydrogen storage
CA 2580160 C · Owner: Washington Savannah River Company Llc · Inventors: Schumacher, Ray F.; Heung, Leung K.; Wicks, George G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hollow glass microsphere is provided having a diameter range of between 1 to 140 microns, a density of between 0.05 to 0.50 gm/cc a porouswall structure , having wall openings defining an average pore size of between 10 to 1000 angstroms, and which contains therein a hydrogen storage material. The porouswall structure facilitates the introduction of a hydrogen storage material into the interior of the hollow glass microsphere. Thereafter a barrier , coating may be applied and/or the microspheres are processed to alter or reduce the effective pore size. In this manner the hollow glass microsphere , can provide a membrane for the selective transport of hydrogen through the porous walls …
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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 21, 2005 and granted May 14, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 21, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Timeline
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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.