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Official data from INPI

NAVIO DE CASCO DUPLO TENDO, PELO MENOS, UM ELEMENTO DE TANQUE DE EQUILÍBRIO

Arquivada/ExtintaInvention Patent

Application data

Number

PI9101815

Type

Invention Patent

Filing

05/06/1991

Publication

12/17/1991

Progress at the INPI

  1. Filing05/06/91
  2. Publication12/17/91
  3. Examination06/30/92
  4. Allowance08/09/94
  5. Grant04/25/95
  6. Expired06/22/10

The letters patent expired on 06/22/2010: 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: 06/22/2010. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Chevron Research And Technology Company

US

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Inventors

D. A. (pessoa física)

US

R. Y. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

519,386 · 05/04/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 06/05/2006

06/22/2010

RPI 2059

Concessão da patente

#16.1

04/25/1995

RPI 1273

Notificação para pagamento de retribuição

#13.1

12/06/1994

RPI 1253

Deferimento

#9.1

08/09/1994

RPI 1236

Solicitação de exame técnico

#4.1

06/30/1992

RPI 1126

Publicação do pedido de patente

#3.1

12/17/1991

RPI 1098

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