(11) 98705-3426
TrademarkIQ iconTrademarkIQ
Back to search
Official data from INPI

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

ConcedidaInvention Patent
Talk to an expert

Application data

Number

PI7804925

Type

Invention Patent

Filing

10/28/1977

Publication

-
View on INPI

Progress at the INPI

  1. Filing10/28/77
  2. Publication
  3. Examination
  4. Allowance01/10/84
  5. Grant07/31/84
  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: 07/31/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

HUGHES TOOL CO

See this company's full portfolio

Inventors

L. L. (pessoa física)

Technical data

IPC Classification

E21B 3/00F16C 13/02

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/31/1984

RPI 719

Notificação para pagamento de retribuição

#13.1

05/02/1984

RPI 706

Deferimento

#9.1

01/10/1984

RPI 690

Exigência - art. 36 da LPI

#6.1

08/02/1983

RPI 667

Exigência - art. 36 da LPI

#6.1

10/13/1982

RPI 625

6.2

01/19/1982

RPI 587

Carta-patente expirada

#21.1

12/14/1993

RPI 1202

Related

Patent monitoring

Track this patent in real time.

Receive alerts on INPI events, decisions, and expiry dates for your portfolio.