Agricultural mulch and row cover
CA 2055182 A1 · Owner: Knaak, William E. · Inventors: Weber, Robert E.; Knaak, William E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an agricultural mulch made from a fibrous cellulosic web having a certain breaking length and which had been surface-coated with a latex coating to improve wet strength and handling properties. The material of the present invention, once formed, is particularly suitable for use in agricultural applications to control weeds soil moisture and, temperature. The mulch can be engineered to have a useful life which will correspond to the growing cycle of a specific crop. Unlike plastic once the crop has been harvested, the material of the present invention is much more suitable for composing due to the degradable nature of the product.
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 November 8, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2013.
- 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.