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Official data from INPI

TIJOLO REFRATÁRIO CERAMICAMENTE LIGADO COM ALTO TEOR EM ALUMINA.

ConcedidaInvention Patent

Application data

Number

PI8005182

Type

Invention Patent

Filing

08/15/1980

Publication

-

Progress at the INPI

  1. Filing08/15/80
  2. Publication
  3. Examination
  4. Allowance10/27/87
  5. Grant05/31/88
  6. Expired09/26/95

The letters patent expired on 09/26/1995: 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: 05/31/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Dresser Industries Inc

US

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Inventors

M. D. (pessoa física)

P. S. (pessoa física)

Technical data

Priority claims

US

067.582 · 08/17/1980

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/31/1988

RPI 919

Notificação para pagamento de retribuição

#13.1

03/01/1988

RPI 906

Deferimento

#9.1

10/27/1987

RPI 888

Exigência - art. 36 da LPI

#6.1

11/25/1986

RPI 840

Carta-patente expirada

#21.1

09/26/1995

RPI 1295

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