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Official data from INPI

PROCESSO DE PREPARAÇÃO DE UM AGENTE DE SUSPENSÃO E PROCESSO DE OBTENÇÃO DE COPOLÍMEROS DE ESTIRENO-ACRILONITRILA.

ConcedidaInvention Patent

Application data

Number

PI7905889

Type

Invention Patent

Filing

09/14/1979

Publication

-

Progress at the INPI

  1. Filing09/14/79
  2. Publication
  3. Examination
  4. Allowance04/29/86
  5. Grant12/30/86
  6. Expired04/25/95

The letters patent expired on 04/25/1995: 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: 12/30/1986. 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

C. P. (pessoa física)

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/30/1986

RPI 845

Notificação para pagamento de retribuição

#13.1

09/02/1986

RPI 828

Deferimento

#9.1

04/29/1986

RPI 810

8.1

12/31/1985

RPI 793

Exigência - art. 36 da LPI

#6.1

07/02/1985

RPI 767

Exigência - art. 36 da LPI

#6.1

02/20/1985

RPI 748

6.5

05/22/1984

RPI 709

Exigência - art. 36 da LPI

#6.1

02/28/1984

RPI 697

Carta-patente expirada

#21.1

04/25/1995

RPI 1273

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