Method and apparatus for reclaiming effluent from a freeze-drying process, and uses for effluent
CA 2548663 C · Owner: Alstat, Edward K. · Inventors: Alstat, Edward K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for reclaiming effluent from a freeze drying process has at least one condenser apparatus used during a freeze-drying cycle to collect effluent from material being freeze-dried, and a recovery reservoir positioned for collecting material from the condenser apparatus. The system is characterized in that ice crystals formed from the effluent are removed from the condenser after the freeze drying cycle into recovery reservoir to be re-used. Product systems include both freeze-dried material and the effluent collected during freeze drying.
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 December 6, 2004 and granted February 21, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 6, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.