Fertilizers

US4402725A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Harold Heller · Narberth, US
• Dietmar Schapel · Cologne, DE
• Claus Hentschel · Cologne, DE
• Manfred Dahm · Leverkusen, DE

Key dates

• Filing date: Mar 6, 1981
• Grant date: Sep 6, 1983
• Expiry date: Mar 6, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S71/904
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A fertilizer for the long term and uniform supply of plants with nutrient ions comprising a covalently crosslinked hydrogel in which are embedded ion exchangers which are laden with plant nutrients; furthermore a process for the long term and uniform supply of plants with nutrient ions wherein a covalently crosslinked hydrogel in which are embedded ion exchangers which are laden with plant nutrients is applied to the plants or their environment.