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Official data from INPI

DISPOSITIVO TRANSCARREGADOR PARA ASSEGURAR TENSIONAMENTO UNIFORME

Em AnáliseInvention Patent
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Application data

Number

PI8704946

Type

Invention Patent

Filing

09/25/1987

Publication

05/24/1988
View on INPI

Progress at the INPI

  1. Filing09/25/87
  2. Publication05/24/88
  3. Examination10/23/90
  4. Allowance02/25/92
  5. Grant11/24/92
  6. Terminated06/25/96

The patent was granted on 11/24/1992 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 10/31/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Baroid Drilling Fluids,Inc.

US

Inventors

G. E. (pessoa física)

US

J. J. (pessoa física)

US

Technical data

IPC Classification

B63B 21/50B63B 39/00

Priority claims

US

915.519 · 10/06/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

14.6

10/31/1989

RPI 993

Publicação do pedido de patente

#3.1

05/24/1988

RPI 918

Pedido de patente depositado

#2.1

12/22/1987

RPI 896

Anuidade - prazo legal encerrado

#18.2

06/25/1996

RPI 1334

Concessão da patente

#16.1

11/24/1992

RPI 1147

Notificação para pagamento de retribuição

#13.1

07/07/1992

RPI 1127

Deferimento

#9.1

02/25/1992

RPI 1108

Exigência - art. 36 da LPI

#6.1

08/13/1991

RPI 1080

Solicitação de exame técnico

#4.1

10/23/1990

RPI 1038

14.1

02/13/1990

RPI 1006

14.4

02/06/1990

RPI 1005

14.4

01/23/1990

RPI 1003

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