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Official data from INPI

REFRATARIO RESISTENTE A FRAGMENTACAO E A CORROSAO

ConcedidaInvention Patent

Application data

Number

PI7907220

Type

Invention Patent

Filing

11/07/1978

Publication

-

Progress at the INPI

  1. Filing11/07/78
  2. Publication
  3. Examination
  4. Allowance07/01/86
  5. Grant04/28/87
  6. Expired05/02/95

The letters patent expired on 05/02/1995: 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: 04/28/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

KUROSAKI REFRACTORIES CO

Inventors

I. T. (pessoa física)

S. H. (pessoa física)

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

04/28/1987

RPI 862

100

07/01/1986

RPI 819

Petição de recurso

#12.2

08/06/1985

RPI 772

Indeferimento

#9.2

04/16/1985

RPI 756

Carta-patente expirada

#21.1

05/02/1995

RPI 1274

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