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Official data from INPI

CONEXÃO ROSCADA E CONDUTO TUBULAR

Em AnáliseInvention Patent

Application data

Number

PI8406846

Type

Invention Patent

Filing

04/05/1984

Publication

03/19/1985

Progress at the INPI

  1. Filing04/05/84
  2. Publication03/19/85
  3. Examination10/29/85
  4. Allowance12/27/88
  5. Grant03/20/90
  6. Expired07/08/08

The letters patent expired on 07/08/2008: 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: 05/02/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Hydril Company

US

See this company's full portfolio

Inventors

D. R. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

489.739 · 04/29/1983

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Notificação para pagamento de retribuição

#13.1

05/02/1989

RPI 967

Deferimento

#9.1

12/27/1988

RPI 949

6.2

09/22/1987

RPI 883

Solicitação de exame técnico

#4.1

10/29/1985

RPI 784

Notificação de entrada na fase nacional - PCT

#1.3

03/19/1985

RPI 752

Carta-patente expirada

#21.1

Patente extinta em 05/04/99

07/08/2008

RPI 1957

Concessão da patente

#16.1

03/20/1990

RPI 1010

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