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Official data from INPI

VÁLVULA DE SEGURANÇA DE TUBO VERTICAL MARÍTIMO E MEMBRO CILÍNDRICO PARA USO NA MESMA

Em AnáliseInvention Patent

Application data

Number

PI8605620

Type

Invention Patent

Filing

02/27/1986

Publication

05/05/1987

Progress at the INPI

  1. Filing02/27/86
  2. Publication05/05/87
  3. Examination09/13/88
  4. Allowance02/19/91
  5. Grant09/24/91
  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: 09/13/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Hydril Company

US

See this company's full portfolio

Inventors

J. R. (pessoa física)

US

Technical data

Priority claims

US

707.760 · 03/04/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

09/13/1988

RPI 934

Notificação de entrada na fase nacional - PCT

#1.3

05/05/1987

RPI 863

Carta-patente expirada

#21.1

Patente extinta em 27/02/2001

07/22/2008

RPI 1959

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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