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Official data from INPI

PROCESSO PARA REDUZIR O PESO MOLECULAR DE UM POLÍMERO DE OLEFINA, E, COMPOSIÇÃO DE ÓLEO LUBRIFICANTE

Em AnáliseInvention Patent

Application data

Number

PI8603178

Type

Invention Patent

Filing

07/08/1986

Publication

02/24/1987

Progress at the INPI

  1. Filing07/08/86
  2. Publication02/24/87
  3. Examination02/08/89
  4. Allowance10/19/93
  5. Grant05/31/94
  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: 02/08/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Exxon Chemical Patents Inc

US

See this company's full portfolio

Inventors

D. C. (pessoa física)

US

J. J. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

752,627 · 07/08/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

02/08/1989

RPI 955

Publicação do pedido de patente

#3.1

02/24/1987

RPI 853

Pedido de patente depositado

#2.1

12/30/1986

RPI 845

Carta-patente expirada

#21.1

Patente extinta em 08/07/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

05/31/1994

RPI 1226

Deferimento

#9.1

10/19/1993

RPI 1194

Exigência - art. 36 da LPI

#6.1

07/14/1992

RPI 1128

Exigência - art. 36 da LPI

#6.1

07/30/1991

RPI 1078

6.2

01/02/1990

RPI 1000

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