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Official data from INPI

PROCESSO E APARELHO PARA CALCINAR SULFATO DE CÁLCIO DIHIDRATO OU MATERIAL SENSÍVEL AO CALOR SIMILAR

PublicadaInvention Patent
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Application data

Number

PI8700039

Type

Invention Patent

Filing

01/07/1987

Publication

12/01/1987
View on INPI

Progress at the INPI

  1. Filing01/07/87
  2. Publication12/01/87
  3. Examination08/28/90
  4. Allowance12/22/92
  5. Grant06/29/93
  6. Expired07/29/08

The letters patent expired on 07/29/2008: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 12/01/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

BPB Industries Public Limited Company

GB

Inventors

D. B. (pessoa física)

GB

Technical data

IPC Classification

B01J 6/00C04B 11/02

Priority claims

GB

86 00275 · 01/07/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

12/01/1987

RPI 893

Pedido de patente depositado

#2.1

05/12/1987

RPI 864

Carta-patente expirada

#21.1

Patente extinta em 07/01/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

06/29/1993

RPI 1178

Notificação para pagamento de retribuição

#13.1

04/27/1993

RPI 1169

Deferimento

#9.1

12/22/1992

RPI 1151

Exigência - art. 36 da LPI

#6.1

03/24/1992

RPI 1112

Solicitação de exame técnico

#4.1

08/28/1990

RPI 1030

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