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Official data from INPI

COMPOSIÇÃO REFRATÁRIA E COMPOSIÇÃO REFRATÁRIA DE JATEAMENTO

ConcedidaInvention Patent

Application data

Number

PI8302022

Type

Invention Patent

Filing

04/20/1983

Publication

12/27/1983

Progress at the INPI

  1. Filing04/20/83
  2. Publication12/27/83
  3. Examination02/28/84
  4. Allowance01/10/89
  5. Grant08/29/89
  6. Terminated12/17/96

The patent was granted on 08/29/1989 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 08/29/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Martin Marietta Magnesia Specialties Inc.

US

Inventors

D. N. (pessoa física)

US

I. K. (pessoa física)

US

M. M. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

372.413 · 04/27/1982

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/29/1989

RPI 984

Notificação para pagamento de retribuição

#13.1

05/30/1989

RPI 971

Deferimento

#9.1

01/10/1989

RPI 951

Exigência - art. 36 da LPI

#6.1

08/09/1988

RPI 929

Exigência - art. 36 da LPI

#6.1

03/15/1988

RPI 908

Exigência - art. 36 da LPI

#6.1

05/14/1985

RPI 760

Solicitação de exame técnico

#4.1

02/28/1984

RPI 697

Publicação do pedido de patente

#3.1

12/27/1983

RPI 688

Pedido de patente depositado

#2.1

06/07/1983

RPI 659

Anuidade - prazo legal encerrado

#18.2

12/17/1996

RPI 1359

Pedido de licença compulsória

#20.1

06/19/1990

RPI 1023

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