Chemistry: fertilizers – Processes and products – Inorganic material
Reexamination Certificate
2006-12-27
2011-10-11
Langel, Wayne (Department: 1736)
Chemistry: fertilizers
Processes and products
Inorganic material
C423S157200
Reexamination Certificate
active
08034149
ABSTRACT:
The present invention relates to obtaining a fertilizer with sustained release of phosphorus, enriched with other macro and micronutrients, which can be produced by pyrolysis of pyrobituminous shale, in combination with calcareous shale and with natural phosphatidic rocks. The invention presents a process for obtaining a solid fertilizer with sustained release of phosphorus, enriched with Ca, Mg, S, Si and micronutrients, by a combination of pyrolysis of a pyrobituminous shale at a temperature of 450-500° C., with the addition of calcareous shale and of a phosphatidic rock, which represents a promising innovation compared to the prior art, and will certainly serve to fill a gap in the availability of fertilizers permitted for use in agroecological systems.
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Neves Vieira Valmor
Novicki Luiz Alberto Medeiros
Pillon Clenio Nailto
Scivittaro Walkyria Bueno
Torii Waldemar Jiro
Empresa Brasileira de Pesquisa Agropecuaria-Embrapa
Langel Wayne
Petroleo Brasileiro S.A.--Petrobras
Sughrue & Mion, PLLC
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