The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 13, 1994
Filed:
Sep. 09, 1993
Leonard N Albrecht, Palm Springs, CA (US);
Deep Root Partners, L.P., Burlingame, CA (US);
Abstract
The root-control planter has a thin-walled frustoconical body that is open at the top and bottom, and that has vertically-spaced ledges that lie in planes perpendicular to the axis of the frustum. Internal ribs or ridges are provided integrally with the body, and have vertically-spaced hook or notch portions that hook not only over the top of another identical planter but also over the ledges thereof. At the bottom of the frustum is a radially-outwardly extending flange. At circumferentially spaced points about the bottom region of the body, and adjacent the flange, are relatively small openings through which certain tree roots will grow and lock the planter in the ground despite the upward forces exerted by other tree roots that pass beneath the flange. At the top of the planter body is a continuous rim that is bent-over in an inward direction, hooking or bending over the upper ends of the ribs.