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Official data from INPI

PROCESSO PARA A PREPARACAO DE ACIDO 3,3-DIMETIL-2-OXOBUTIRICO

Concessão AnuladaInvention Patent

Application data

Number

PI7906994

Type

Invention Patent

Filing

11/13/1978

Publication

-

Progress at the INPI

  1. Filing11/13/78
  2. Publication
  3. Examination09/08/82
  4. Allowance04/19/83
  5. Grant10/25/83
  6. Expired05/02/95

The letters patent expired on 05/02/1995: 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: 01/10/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MOBAY CHEMICAL CORP

Inventors

J. D. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

16.3

01/10/1984

RPI 690

Concessão da patente

#16.1

10/25/1983

RPI 679

Notificação para pagamento de retribuição

#13.1

09/06/1983

RPI 672

Deferimento

#9.1

04/19/1983

RPI 652

Solicitação de exame técnico

#4.1

09/08/1982

RPI 620

Carta-patente expirada

#21.1

05/02/1995

RPI 1274

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