Official data from INPI

PROCESSO PARA A OBTENCAO DE SULFATOS DE CALCIO DE PREFERENCIA DI - HIDRATO DE SULFATO DE CALCIO

ConcedidaInvention Patent

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Application data

Number

PI8300714

Type

Invention Patent

Filing

02/15/1982

Publication

11/16/1983

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Progress at the INPI

Filing02/15/82
Publication11/16/83
Examination09/03/85
Allowance06/21/88
Grant02/28/89
Terminated02/18/92

The patent was granted on 02/28/1989 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 02/28/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

BOERGARDTS SACHSENSTEIN GMBH [DE]

Inventors

R. V. (pessoa física)

S. V. (pessoa física)

Technical data

IPC Classification

C01F 11/46

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

02/28/1989

RPI 958

Notificação para pagamento de retribuição

#13.1

10/25/1988

RPI 940

Deferimento

#9.1

06/21/1988

RPI 922

Exigência - art. 36 da LPI

#6.1

12/08/1987

RPI 894

6.2

11/18/1986

RPI 839

Solicitação de exame técnico

#4.1

09/03/1985

RPI 776

Publicação do pedido de patente

#3.1

11/16/1983

RPI 682

Pedido de patente depositado

#2.1

03/29/1983

RPI 649

Anuidade - prazo legal encerrado

#18.2

02/18/1992

RPI 1107

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