Anticipate This!™ | Patent and Trademark Law Blog

They Invented What? (No. 61)

Posted in They Invented What? by Jake Ward on August 22, 2007

U.S. Pat. No. 6,233,866:  Plant attachment device for killing obnoxious plants.

 plantkiller

What is claimed is:

1. A plant attachment device for chemically killing an individual plant comprising:

a herbicide carrier, said herbicide carrier including a housing having a chamber therein for encompassing a portion of a cut stem of a deeply rooted cut plant, said herbicide carrier having a first closed end and a second end;
a herbicide for killing a plant, said herbicide located in said chamber, said herbicide maintainable in said chamber;
a plant engagement member, said plant engagement member engaging the cut stem of the deeply rooted cut plant to maintain the herbicide carrier in position thereon to enable the herbicide to penetrate and kill the cut plant.

2. The plant attachment device of claim 1 wherein the plant engagement member comprises a cover.

3. The plant attachment device of claim 2 wherein the cover comprises a plurality of resilient members that are cantileverly mounted on the housing and flex inward around the cut plant stem.

4. The plant attachment device of claim 1 wherein the housing comprises a polymer plastic.

5. The plant attachment device of claim 2 wherein the housing comprises a biodegradable material.

6. The plant attachment device of claim 2 wherein the cover comprises at least six flexible segments.

7. The plant attachment device of claim 1 wherein the housing is rigid to prevent accidental disengorgement of herbicide therefrom.

8. The plant attachment device of claim 1 wherein the chamber includes a first portion of a chamber free of the herbicide and a second portion of the chamber with the herbicide therein with the first portion of the chamber free of the herbicide forming a reservoir to accommodate displacement of herbicide in the herbicide carrier as a cut plant stem is inserted therein.

9. The plant attachment device of claim 1 wherein the herbicide is carried in a viscous non-flowable medium.

10. The plant attachment device of claim 1 wherein the second end of the carrier is completely closed by a penetrable cover.

11. The method of killing an obnoxious weed comprising the steps of:

cutting a stem of an obnoxious weed slightly above ground level to leave a cut weed stem with an exposed face;
inserting the end of the cut weed stem into a housing having a penetrable cover so that the penetrable cover can engage and hold the housing in a capped postion to thereby enable a herbicide in the herbicide carrier to penetrate into a root system of the cut weed stem.

12. The method of claim 11 including the step of cutting the stem at an angle to increase the surface area of the exposed face for coming into contact with the herbicide.

13. The method of claim 12 including flexing the cover of the carrier with the cut stem by axially aligning the carrier and the cut stem before inserting the stem though the flexible cover.

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