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Official data from INPI

ACOPLAMENTO TUBULAR

ConcedidaInvention Patent

Application data

Number

PI8404736

Type

Invention Patent

Filing

01/13/1984

Publication

12/26/1984

Progress at the INPI

  1. Filing01/13/84
  2. Publication12/26/84
  3. Examination09/17/85
  4. Allowance12/20/88
  5. Grant09/26/89
  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: 09/26/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Hydril Company

US

See this company's full portfolio

Inventors

D. O. (pessoa física)

US

D. R. (pessoa física)

US

T. B. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

458.732 · 01/17/1983

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/26/1989

RPI 988

Notificação para pagamento de retribuição

#13.1

07/18/1989

RPI 978

9.1.3

03/28/1989

RPI 962

Deferimento

#9.1

12/20/1988

RPI 948

6.2

09/08/1987

RPI 881

Solicitação de exame técnico

#4.1

09/17/1985

RPI 778

Notificação de entrada na fase nacional - PCT

#1.3

12/26/1984

RPI 740

Carta-patente expirada

#21.1

Patente extinta em 13/01/99

07/08/2008

RPI 1957

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