Solicitação de exame técnico
#4.1
03/11/1986
RPI 803
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Official data from INPI
PROCESSO PARA REDUZIR A RADIOTIVIDADE EM SULFATO DE CALCIO CONTENDO CONTAMINACAO RADIOATIVA,PROCESSO VIA UMIDA DO TIPO HEMIDRATO PARA PRODUCAO DE ACIDO FOSFORICO E SULFATO DE CALCIO DE ROCHA DE FOSFATO E PROCESSO DE DIIDRATO VIA UMIDA PARA PRODUCAO DE ACIDO FOSFORICO E SULFATO DE CALCIO DE ROCHA DE FOSFATO
Em AnáliseInvention Patent
Application data
Number
PI8303457Type
Invention Patent
Filing
06/29/1982
Publication
02/07/1984
Progress at the INPI
- Filing06/29/82
- Publication02/07/84
- Examination03/11/86
- Allowance
- Grant
- In force
Published on 02/07/1984, the application is awaiting technical examination at the INPI, which decides whether the invention meets the patentability requirements.
Latest action published by the INPI: 03/11/1986. We update with every new RPI gazette, published weekly.
Applicants and inventors
Applicants
UNITED STATES GYPSUM CO [US]
Inventors
G. C. (pessoa física)
P. W. (pessoa física)
Technical data
IPC Classification
Prosecution history
Publications in the Brazilian Industrial Property Gazette (RPI).
Publicação do pedido de patente
#3.1
02/07/1984
RPI 694
Pedido de patente depositado
#2.1
08/09/1983
RPI 668
Retificação
#15.3
04/09/1991
RPI 1062
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