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Official data from INPI

PROCESSO PARA MODIFICAÇÃO, SOLUBILIZAÇÃO E/OU HIDRÓLISE DE UM HIDRATO DE CARBONO, E PRODUTO OBTIDO

ConcedidaInvention Patent

Application data

Number

PI8104434

Type

Invention Patent

Filing

07/10/1981

Publication

03/30/1982

Progress at the INPI

  1. Filing07/10/81
  2. Publication03/30/82
  3. Examination04/03/84
  4. Allowance07/08/86
  5. Grant02/03/87
  6. Expired10/08/96

The letters patent expired on 10/08/1996: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

Talk to a specialist

Latest action published by the INPI: 02/03/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Imperial Chemical Industries Limited

GB

Zeneca Limited

GB

See this company's full portfolio

Inventors

B. S. (pessoa física)

S. P. (pessoa física)

Technical data

IPC Classification

Priority claims

GB

8022715 · 07/11/1980

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

02/03/1987

RPI 850

Notificação para pagamento de retribuição

#13.1

11/04/1986

RPI 837

Deferimento

#9.1

07/08/1986

RPI 820

Exigência - art. 36 da LPI

#6.1

03/12/1985

RPI 751

Solicitação de exame técnico

#4.1

04/03/1984

RPI 702

Publicação do pedido de patente

#3.1

03/30/1982

RPI 597

Carta-patente expirada

#21.1

10/08/1996

RPI 1349

Pedido de licença compulsória

#20.1

09/12/1995

RPI 1293

20.4

09/05/1995

RPI 1292

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