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Official data from INPI

PROCESSO PARA SEPARAÇÃO DE AMINA

ConcedidaInvention Patent

Application data

Number

PI8100388

Type

Invention Patent

Filing

01/23/1981

Publication

-

Progress at the INPI

  1. Filing01/23/81
  2. Publication
  3. Examination11/08/83
  4. Allowance01/15/85
  5. Grant10/01/85
  6. Expired03/19/96

The letters patent expired on 03/19/1996: 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: 10/01/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Imperial Chemical Industries Limited

GB

Imperial Chemical Industries Plc.

GB

See this company's full portfolio

Inventors

F. W. (pessoa física)

Technical data

IPC Classification

Priority claims

GB

8004303 · 02/08/1980

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/01/1985

RPI 780

Notificação para pagamento de retribuição

#13.1

05/07/1985

RPI 759

Deferimento

#9.1

01/15/1985

RPI 743

Exigência - art. 36 da LPI

#6.1

05/29/1984

RPI 710

Solicitação de exame técnico

#4.1

11/08/1983

RPI 681

Carta-patente expirada

#21.1

03/19/1996

RPI 1320

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