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Official data from INPI

PROCESSO E APARELHO DO TIPO ESCUDO PARA ESCAVAR UM TUNEL HORIZONTAL

ConcedidaInvention Patent

Application data

Number

PI7700878

Type

Invention Patent

Filing

02/12/1976

Publication

-

Progress at the INPI

  1. Filing02/12/76
  2. Publication
  3. Examination
  4. Allowance04/06/82
  5. Grant10/26/82
  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.

Talk to a specialist

Latest action published by the INPI: 10/26/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DAIHO CONSTRUCTION CO LTD

Inventors

H. H. (pessoa física)

K. Y. (pessoa física)

S. T. (pessoa física)

S. M. (pessoa física)

T. T. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/26/1982

RPI 627

Notificação para pagamento de retribuição

#13.1

07/27/1982

RPI 614

15.0

04/27/1982

RPI 601

Deferimento

#9.1

04/06/1982

RPI 598

6.2

10/20/1981

RPI 574

Carta-patente expirada

#21.1

07/27/1993

RPI 1182

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