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Official data from INPI

Aperfeiçoamento em processo para a produção de aço - silício eletro - magnético

ConcedidaInvention Patent

Application data

Number

PI7803540

Type

Invention Patent

Filing

06/02/1978

Publication

-

Progress at the INPI

  1. Filing06/02/78
  2. Publication
  3. Examination
  4. Allowance12/07/82
  5. Grant06/28/83
  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: 06/28/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Allegheny Ludlum Industries INC

See this company's full portfolio

Inventors

B. J. (pessoa física)

B. H. (pessoa física)

Technical data

IPC Classification

Priority claims

US

807.092 · 06/16/1977

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/28/1983

RPI 662

Notificação para pagamento de retribuição

#13.1

05/17/1983

RPI 656

Republicação - classificação IPC

#15.11

01/11/1983

RPI 638

Deferimento

#9.1

12/07/1982

RPI 633

6.2

12/15/1981

RPI 582

Carta-patente expirada

#21.1

11/30/1993

RPI 1200

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