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Official data from INPI

MEMBRO TUBULAR ROSQUEADO, E JUNTA DE TUBO PARA POÇOS

Em AnáliseInvention Patent

Application data

Number

PI8606927

Type

Invention Patent

Filing

10/09/1986

Publication

11/03/1987

Progress at the INPI

  1. Filing10/09/86
  2. Publication11/03/87
  3. Examination08/09/88
  4. Allowance05/18/93
  5. Grant09/28/93
  6. Expired07/22/08

The letters patent expired on 07/22/2008: 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: 08/09/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Hydril Company

US

See this company's full portfolio

Inventors

D. O. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

787.662 · 10/15/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

08/09/1988

RPI 929

Notificação de entrada na fase nacional - PCT

#1.3

11/03/1987

RPI 889

Carta-patente expirada

#21.1

Patente extinta em 09/10/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

09/28/1993

RPI 1191

Deferimento

#9.1

05/18/1993

RPI 1172

102

02/02/1993

RPI 1157

Pedido de recurso

#12.3

10/08/1991

RPI 1088

11.3

07/02/1991

RPI 1074

Exigência - art. 36 da LPI

#6.1

01/22/1991

RPI 1051

Exigência - art. 36 da LPI

#6.1

05/15/1990

RPI 1018

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