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Official data from INPI

PROCESSO PARA A FLOCULAÇÃO DE RESÍDUOS VERMELHOS DE BAUXITA DO CIRCUITO DE RECUPERAÇÃO DE ALUMINA "BAYER".

ConcedidaInvention Patent

Application data

Number

PI8104729

Type

Invention Patent

Filing

07/22/1981

Publication

04/13/1982

Progress at the INPI

  1. Filing07/22/81
  2. Publication04/13/82
  3. Examination05/15/84
  4. Allowance02/04/86
  5. Grant08/26/86
  6. Expired11/12/96

The letters patent expired on 11/12/1996: 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: 08/26/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

American Cyanamid Company

US

See this company's full portfolio

Inventors

B. N. (pessoa física)

Technical data

IPC Classification

Priority claims

US

171.616 · 07/23/1980

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/26/1986

RPI 827

Notificação para pagamento de retribuição

#13.1

06/24/1986

RPI 818

Deferimento

#9.1

02/04/1986

RPI 798

Exigência - art. 36 da LPI

#6.1

11/20/1984

RPI 735

Solicitação de exame técnico

#4.1

05/15/1984

RPI 708

Publicação do pedido de patente

#3.1

04/13/1982

RPI 599

Carta-patente expirada

#21.1

11/12/1996

RPI 1354

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