Chemistry: fertilizers – Processes and products – Organic material-containing
Patent
1973-06-27
1978-04-04
Hart, Charles N.
Chemistry: fertilizers
Processes and products
Organic material-containing
71 64E, 71 64F, C05C 900
Patent
active
040825337
ABSTRACT:
A coated product providing for the controlled release of an active constituent, such as a fertilizer, over a long period of time comprising a core of an active constituent and two water insoluble coatings. The first coating surrounding the core contains masonry cement, and the second coating preferably contains a blend of one or more thermoplastic polymers and a wax. The coated product provides an unusually long lasting fertilizer at relatively low cost.
REFERENCES:
patent: RE27238 (1971-11-01), Stansbury
patent: 2806773 (1957-09-01), Pole
patent: 3192031 (1965-06-01), Zaayenga
patent: 3372019 (1968-03-01), Fox
Scheiderer Edwin L.
Wittenbrook Lawrence S.
D. M. Scott & Sons Company
Hart Charles N.
Holt H. J.
Lander Ferris H.
Raden J. B.
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