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Official data from INPI

PROCESSO DE DESIDRATAÇÃO DE UM ÁLCOOL DE BAIXO PESO MOLECULAR.

ConcedidaInvention Patent

Application data

Number

PI8101487

Type

Invention Patent

Filing

03/13/1981

Publication

10/26/1982

Progress at the INPI

  1. Filing03/13/81
  2. Publication10/26/82
  3. Examination02/22/83
  4. Allowance05/07/85
  5. Grant10/29/85
  6. Expired09/24/96

The letters patent expired on 09/24/1996: 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: 10/29/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Petróleo Brasileiro S/A - Petrobrás

RJ, BR

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Inventors

B. J. (pessoa física)

B. V. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/29/1985

RPI 784

Notificação para pagamento de retribuição

#13.1

08/27/1985

RPI 775

Deferimento

#9.1

05/07/1985

RPI 759

Solicitação de exame técnico

#4.1

02/22/1983

RPI 644

Publicação do pedido de patente

#3.1

10/26/1982

RPI 627

Carta-patente expirada

#21.1

09/24/1996

RPI 1347

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