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Official data from INPI

PROCESSO E APARELHO PARA PRODUZIR FORMAS MOLDADAS, LIGADAS E COMPACTADAS.

ConcedidaInvention Patent

Application data

Number

PI8307448

Type

Invention Patent

Filing

07/11/1983

Publication

07/17/1984

Progress at the INPI

  1. Filing07/11/83
  2. Publication07/17/84
  3. Examination06/17/86
  4. Allowance12/27/88
  5. Grant09/26/89
  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: 09/26/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

SXD Refractories, Inc.

US

Inventors

D. F. (pessoa física)

US

K. W. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

401,422 · 07/23/1982

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/26/1989

RPI 988

Notificação para pagamento de retribuição

#13.1

05/02/1989

RPI 967

Deferimento

#9.1

12/27/1988

RPI 949

Exigência - art. 36 da LPI

#6.1

05/17/1988

RPI 917

Solicitação de exame técnico

#4.1

06/17/1986

RPI 817

Notificação de entrada na fase nacional - PCT

#1.3

07/17/1984

RPI 717

Carta-patente expirada

#21.1

Patente extinta em 11/07/98

07/01/2008

RPI 1956

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