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Official data from INPI

CHAPA DE ACO ELETROMAGNETICA DE GRAO ORIENTADO

ConcedidaInvention Patent

Application data

Number

PI7802800

Type

Invention Patent

Filing

05/04/1977

Publication

-

Progress at the INPI

  1. Filing05/04/77
  2. Publication
  3. Examination
  4. Allowance02/14/84
  5. Grant08/28/84
  6. Expired11/30/93

The letters patent expired on 11/30/1993: 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: 08/28/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

NIPPON STEEL CORP

See this company's full portfolio

Inventors

K. K. (pessoa física)

T. O. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/28/1984

RPI 723

Notificação para pagamento de retribuição

#13.1

06/05/1984

RPI 711

Deferimento

#9.1

02/14/1984

RPI 695

Exigência - art. 36 da LPI

#6.1

03/22/1983

RPI 648

8.1

01/05/1982

RPI 585

6.2

12/15/1981

RPI 582

Carta-patente expirada

#21.1

11/30/1993

RPI 1200

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