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Official data from INPI

DISPOSITIVO APERFEICOADO DE RETENCAO DE ELEMENTO CORTANTE EM COMBINACAO COM UM TREPANO PERFURATRIZ

ConcedidaInvention Patent

Application data

Number

PI7804960

Type

Invention Patent

Filing

10/28/1977

Publication

-

Progress at the INPI

  1. Filing10/28/77
  2. Publication
  3. Examination
  4. Allowance09/28/82
  5. Grant05/31/83
  6. Expired12/14/93

The letters patent expired on 12/14/1993: 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: 05/31/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

HUGHES TOOL CO

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Inventors

G. E. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/31/1983

RPI 658

Notificação para pagamento de retribuição

#13.1

02/01/1983

RPI 641

Deferimento

#9.1

09/28/1982

RPI 623

Exigência - art. 36 da LPI

#6.1

03/02/1982

RPI 593

Carta-patente expirada

#21.1

12/14/1993

RPI 1202

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