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Official data from INPI

Processo de praparação de hidrogéis; co-gel de sílica-alumina-óxido de meta; catalisador para conversão de hidrocarbonetos.

ConcedidaInvention Patent

Application data

Number

PI8301356

Type

Invention Patent

Filing

03/18/1983

Publication

11/29/1983

Progress at the INPI

  1. Filing03/18/83
  2. Publication11/29/83
  3. Examination01/14/86
  4. Allowance03/17/87
  5. Grant08/25/87
  6. Terminated10/02/90

The patent was granted on 08/25/1987 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 08/25/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

W.R. Grace & Co.

US

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Inventors

C. L. (pessoa física)

S. A. (pessoa física)

Technical data

IPC Classification

Priority claims

US

361.426 · 03/24/1982

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/25/1987

RPI 879

Deferimento

#9.1

03/17/1987

RPI 856

Solicitação de exame técnico

#4.1

01/14/1986

RPI 795

Publicação do pedido de patente

#3.1

11/29/1983

RPI 684

Pedido de patente depositado

#2.1

05/03/1983

RPI 654

Anuidade - prazo legal encerrado

#18.2

10/02/1990

RPI 1035

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