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Official data from INPI

PROCESSO PARA CONVERTER 2-METIL-1-BUTENO EM 2-METIL-2-BUTENO E PROCESSO PARA CONTROLAR A RELAÇÃO DE 2-METIL-2-BUTENO PARA 2-METIL-1-BUTENO EM ISOAMILENOS

Arquivada/ExtintaInvention PatentPCT · US1988003395

Application data

Number

PI8807225

Type

Invention Patent

Filing

09/28/1988

Publication

10/31/1989

PCT

US1988003395

Progress at the INPI

  1. Filing09/28/88
  2. Publication10/31/89
  3. Examination08/20/91
  4. Allowance03/26/96
  5. Grant03/25/97
  6. Expired09/02/08

The letters patent expired on 09/02/2008: 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: 10/31/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Exxon Chemical Patents Inc

US

Exxon Chemical Patents Inc.

US

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Inventors

G. C. (pessoa física)

US

R. M. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

103.287 · 10/01/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Notificação de entrada na fase nacional - PCT

#1.3

10/31/1989

RPI 993

Carta-patente expirada

#21.1

Patente extinta em 28/09/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

03/25/1997

RPI 1373

Deferimento

#9.1

03/26/1996

RPI 1321

Exigência - art. 36 da LPI

#6.1

01/31/1995

RPI 1261

Solicitação de exame técnico

#4.1

08/20/1991

RPI 1081

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