Patent · US Active

Slow calcium release fertilizer

US8425648B2 · kind B2 · utility

2Cited by

1References

6Claims

0Family size

Inventors

Guillermo J. Cisneros · Othello, US
David E. Horn · West Richland, US
Daniel T. Hazen · Bellevue, US
John B. Marler · Bellevue, US

Key dates

Filing date	May 18, 2011
Grant date	Apr 23, 2013
Priority date	—
Expiry date	Nov 14, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC05D3/02
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Slow calcium release fertilizers and methods for their synthesis are described. Organic materials, particularly from manure are used for coating to achieve slow release forms of the fertilizer. Desirably, low temperature kinetic treatments are used to prepare pulverized forms having small size yet well coated with natural (non-denatured) molecular material to achieve the slow release. A desired embodiment is made from kinetic processing of rock gypsum and manure at low temperatures with added acid. Use of the fertilizers leads to acceleration of microbial viability.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.