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Official data from INPI

PROCESSO DE VARIAR A DISTANCIA DE FILAS EM UMA CABECA DE PERFURACAO,E,CABECA DE PERFURACAO TENDO DISPOSITIVOS MONTANTES PARA UMA PLURALIDADE DE CORTADORES DE ROLO

Concessão AnuladaInvention Patent
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Application data

Number

PI8000584

Type

Invention Patent

Filing

02/02/1979

Publication

-
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Progress at the INPI

  1. Filing02/02/79
  2. Publication
  3. Examination10/13/82
  4. Allowance05/31/83
  5. Grant11/29/83
  6. Expired05/16/95

The letters patent expired on 05/16/1995: 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: 09/18/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

SANDVIK AB

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Inventors

L. B. (pessoa física)

P. A. (pessoa física)

Technical data

IPC Classification

E21B 10/26

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Republicação - classificação IPC

#15.11

09/18/1984

RPI 726

16.3

02/14/1984

RPI 695

Republicação - classificação IPC

#15.11

02/07/1984

RPI 694

Concessão da patente

#16.1

11/29/1983

RPI 684

Notificação para pagamento de retribuição

#13.1

09/27/1983

RPI 675

Deferimento

#9.1

05/31/1983

RPI 658

Solicitação de exame técnico

#4.1

10/13/1982

RPI 625

Carta-patente expirada

#21.1

05/16/1995

RPI 1276

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