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Official data from INPI

BUCHA HELICOIDAL E PROCESSO DE SUA FABRICAÇÃO

Em AnáliseInvention Patent

Application data

Number

PI8600892

Type

Invention Patent

Filing

02/28/1986

Publication

09/08/1987

Progress at the INPI

  1. Filing02/28/86
  2. Publication09/08/87
  3. Examination10/10/89
  4. Allowance02/05/91
  5. Grant04/27/93
  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: 10/10/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

V.W. Kaiser Engineering, Inc.

US

Inventors

J. S. (pessoa física)

US

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

10/10/1989

RPI 990

Publicação do pedido de patente

#3.1

09/08/1987

RPI 881

Pedido de patente depositado

#2.1

08/12/1986

RPI 825

Carta-patente expirada

#21.1

Patente extinta em 28/02/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

04/27/1993

RPI 1169

110

01/26/1993

RPI 1156

Recurso

#12.1

05/14/1991

RPI 1067

Republicação - classificação IPC

#15.11

04/30/1991

RPI 1065

Deferimento

#9.1

02/05/1991

RPI 1053

Exigência - art. 36 da LPI

#6.1

08/14/1990

RPI 1028

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