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Official data from INPI

INSERÇÃO E UNIDADE DE OBTURADOR

Em AnáliseInvention Patent

Application data

Number

PI8406796

Type

Invention Patent

Filing

04/06/1984

Publication

03/19/1985

Progress at the INPI

  1. Filing04/06/84
  2. Publication03/19/85
  3. Examination06/16/87
  4. Allowance02/19/91
  5. Grant09/24/91
  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: 10/18/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Hydril Company

US

See this company's full portfolio

Inventors

J. B. (pessoa física)

US

J. H. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

485.619 · 04/18/1983

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Conhecimento de parecer técnico

#7.1

10/18/1988

RPI 939

Pedido de certificado de adição de invenção

#5.1

09/29/1987

RPI 884

Solicitação de exame técnico

#4.1

06/16/1987

RPI 869

Notificação de entrada na fase nacional - PCT

#1.3

03/19/1985

RPI 752

Carta-patente expirada

#21.1

Patente extinta em 06/04/99

07/08/2008

RPI 1957

Concessão da patente

#16.1

09/24/1991

RPI 1086

Notificação para pagamento de retribuição

#13.1

06/04/1991

RPI 1070

Deferimento

#9.1

02/19/1991

RPI 1055

Exigência - art. 36 da LPI

#6.1

07/31/1990

RPI 1026

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