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Official data from INPI

MATERIAL DE ACO REVESTIDO,DOTADO DE EXCELENTE RESISTENCIA A CORROSAO,E APARELHO PARA REVESTIR UM MATERIAL DE ACO COM MANGANES HIDRATADO COMPACTO,FORMADO SOBRE O REVESTIMENTO DE MANGANES

Em AnáliseInvention Patent

Application data

Number

PI7903546

Type

Invention Patent

Filing

07/20/1978

Publication

-

Progress at the INPI

  1. Filing07/20/78
  2. Publication
  3. Examination
  4. Allowance05/18/82
  5. Grant
  6. Expired04/04/95

The letters patent expired on 04/04/1995: 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: 09/08/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

NIPPON STEEL CORP

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Inventors

No inventors listed.

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Notificação para pagamento de retribuição

#13.1

09/08/1982

RPI 620

Deferimento

#9.1

05/18/1982

RPI 604

Carta-patente expirada

#21.1

04/04/1995

RPI 1270

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