Process of increasing the digestability of cellulosic material using nitric acid
CA 1092881 A · Owner: Jelks, James W. · Inventors: Jelks, James W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process of treating cellulosic plant matter to increase the digestability thereof by animals in which, finely divided plant matter, such as sawdust rice hulls, bagasse, wheat straw or the like is mixed with water, and nitric acid and a nonoxidizing acid such as sulfuric, phosphoric, hydrochloric or acetic to produce a mixture, of about 20% water 1/4 to 1% oxygen based on the oven, dried weight of organic material the oxygen being, released from the nitric acid and a pH of 0.5 to 3.5, and cooking the mixture in a pressurized vessel at about 125 psig for 30 to 60 minutes. The cooked product may then be neutralized to raise the pH to a desired level for animal feed.
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 January 6, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 6, 1998.
- 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.