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Official data from INPI

PROCESSO PARA APLICAR UM REVESTIMENTO PROTETOR AS SUPERFICIES INTERIORES DE UMA CARCACA DE TAMBOR DE ACO

ConcedidaInvention Patent

Application data

Number

PI7707935

Type

Invention Patent

Filing

01/14/1977

Publication

-

Progress at the INPI

  1. Filing01/14/77
  2. Publication
  3. Examination
  4. Allowance03/18/86
  5. Grant04/07/87
  6. Expired09/21/93

The letters patent expired on 09/21/1993: 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: 04/07/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

KAISER STEEL CORP

Inventors

O. D. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

04/07/1987

RPI 859

100

03/18/1986

RPI 804

135

05/08/1984

RPI 707

120

02/14/1984

RPI 695

120

01/17/1984

RPI 691

Petição de recurso

#12.2

01/11/1983

RPI 638

Indeferimento

#9.2

07/27/1982

RPI 614

Conhecimento de parecer técnico

#7.1

12/08/1981

RPI 581

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

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