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Official data from INPI

SISTEMA CATALISADOR DE DOIS COMPONENTES, PROCESSO PARA FORMAR ÁCIDO METACRÍLICO E SUPORTE DE CATALISADOR

ConcedidaInvention Patent

Application data

Number

PI8200428

Type

Invention Patent

Filing

01/26/1982

Publication

11/30/1982

Progress at the INPI

  1. Filing01/26/82
  2. Publication11/30/82
  3. Examination06/21/83
  4. Allowance02/09/88
  5. Grant08/30/88
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 08/30/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Ashland Oil, Inc

US

See this company's full portfolio

Inventors

C. D. (pessoa física)

US

Technical data

Priority claims

US

228.304 · 01/26/1981

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/30/1988

RPI 932

Notificação para pagamento de retribuição

#13.1

06/07/1988

RPI 920

Deferimento

#9.1

02/09/1988

RPI 903

Exigência - art. 36 da LPI

#6.1

07/16/1985

RPI 769

Solicitação de exame técnico

#4.1

06/21/1983

RPI 661

Publicação do pedido de patente

#3.1

11/30/1982

RPI 632

Pedido de patente depositado

#2.1

03/16/1982

RPI 595

Carta-patente expirada

#21.1

Patente extinta em 26/01/97

07/01/2008

RPI 1956

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