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Official data from INPI

PROCESSO PARA A SEPARACAO DE UMA DIOLEFINA CONJUGADA DE UMA MISTURA DE HIDROCARBONETOS EM C4 OU C5 CONTENDO ESSA DIOLEFINA E HIDROCARBONETOS ACETILENICOS

ConcedidaInvention Patent

Application data

Number

PI7902012

Type

Invention Patent

Filing

04/05/1978

Publication

-

Progress at the INPI

  1. Filing04/05/78
  2. Publication
  3. Examination11/17/81
  4. Allowance03/22/83
  5. Grant10/25/83
  6. Expired06/21/94

The letters patent expired on 06/21/1994: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 10/25/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

GOODYEAR TIRE & RUBBER

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Inventors

H. C. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/25/1983

RPI 679

Notificação para pagamento de retribuição

#13.1

08/02/1983

RPI 667

Deferimento

#9.1

03/22/1983

RPI 648

Pedido de certificado de adição de invenção

#5.1

05/04/1982

RPI 602

Solicitação de exame técnico

#4.1

11/17/1981

RPI 578

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

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