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Official data from INPI

SEM TITULO

ConcedidaInvention Patent

Application data

Number

PI8307646

Type

Invention Patent

Filing

12/12/1983

Publication

11/27/1984

Progress at the INPI

  1. Filing12/12/83
  2. Publication11/27/84
  3. Examination06/17/86
  4. Allowance12/29/87
  5. Grant07/26/88
  6. Expired07/01/08

The letters patent expired on 07/01/2008: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 07/26/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Hydril Company

US

See this company's full portfolio

Inventors

C. [. (pessoa física)

R. [. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/26/1988

RPI 927

Notificação para pagamento de retribuição

#13.1

05/10/1988

RPI 916

Deferimento

#9.1

12/29/1987

RPI 897

Solicitação de exame técnico

#4.1

06/17/1986

RPI 817

Notificação de entrada na fase nacional - PCT

#1.3

11/27/1984

RPI 736

Carta-patente expirada

#21.1

Patente extinta em 12/12/98

07/01/2008

RPI 1956

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