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Official data from INPI

PROCESSO DE DERRETER CONTINUAMENTE ACO DE UM ALTO GRAU DE PUREZA

ConcedidaInvention Patent

Application data

Number

PI7701177

Type

Invention Patent

Filing

02/28/1976

Publication

-

Progress at the INPI

  1. Filing02/28/76
  2. Publication
  3. Examination
  4. Allowance11/30/82
  5. Grant06/28/83
  6. Expired07/27/93

The letters patent expired on 07/27/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 06/28/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DEMAG AG

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Inventors

G. H. (pessoa física)

K. H. (pessoa física)

R. G. (pessoa física)

T. H. (pessoa física)

Technical data

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

05/10/1983

RPI 655

Republicação - classificação IPC

#15.11

11/30/1982

RPI 632

Deferimento

#9.1

11/30/1982

RPI 632

Conhecimento de parecer técnico

#7.1

11/10/1981

RPI 577

Carta-patente expirada

#21.1

07/27/1993

RPI 1182

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