Seed tube guide
CA 2200618 C · Owner: Bergland, Norman Robert · Inventors: Bergland, Norman Robert; Yoder, Alfred Dean
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is a seed tube guide for maintaining the seed tube in the center of the seed planting furrow between the double disc openers. The seed tube guide comprises a unitary member having left and right forwardly extending mounting plates for engaging a seed tube guard. Each of the mounting plates has a notch for receiving the transversely extending ridge of the seed tube guard. Extending reanwardly are left and right guide members for gripping the seed tube and centering it in the seed planting furrow.
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 March 20, 1997 and granted May 30, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 20, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 20, 2019.
- 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.