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:
Oct. 04, 1977
Filed:
Nov. 12, 1975
Philip B Knapp, Lynbrook, NY (US);
Harold Corey, Teaneck, NJ (US);
Hortigro, Inc., Lynbrook, NY (US);
Abstract
The present invention relates to an apparatus for dispensing plant nutriments to a growing medium, such as soil, sand or the like, the apparatus being effective to transfer to the medium over protracted periods of time doses of nutriments at a rate which is a function essentially solely of the amount of water added to the growing medium at each watering. Broadly stated, the invention relates to a container which preferably includes a probe adapted to be inserted sufficiently below the surface of the growing medium to prevent evaporation. The container is sealed except for a dispensing aperture or apertures in the probe of critical size, larger than a capillary. The apparatus is characterized by its being filled with a hydrophilic gel, within which gel there has been dissolved a soluble nutriment component, preferably in saturation quantities. The gel may contain an inert soluble dye to signal the exhaustion of the active products.