Herbicide applicator
CA 1109673 A · Owner: Roller Inc. · Inventors: Roll, Dwight M.; Kofstad, Myron L.; Habstritt, Charles H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for applying herbicide to tall weeds which extend above a line formed by the upper reaches of desirable crops. The apparatus includes a pair of hydraulic rams for elevating ant lowering a rotatably mounted roller which has a covering of nap material such as nylon-dacron carpeting for facilitating the adherence of the herbicide thereto. A fluid pressure system or systems for controlling the flow rate of herbicide to the roller and for controlling the rotational speed of the roller is provided so that the herbicide application characteristics of the apparatus can be varied in accordance with the weed density and height conditions encountered. A wiper for spreading the herbicide …
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 September 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 29, 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.