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Official data from INPI

PROCESSO DE PREPARACAO DE ANIDRIDO MALEICO

Concessão AnuladaInvention Patent

Application data

Number

PI7802105

Type

Invention Patent

Filing

04/04/1977

Publication

-

Progress at the INPI

  1. Filing04/04/77
  2. Publication
  3. Examination
  4. Allowance06/14/83
  5. Grant12/27/83
  6. Terminated06/29/93

The patent was granted on 12/27/1983 and later terminated. Protection ended before the full term and the technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 03/20/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

STANDARD OIL CO

See this company's full portfolio

Inventors

M. E. (pessoa física)

W. E. (pessoa física)

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

16.3

03/20/1984

RPI 700

Concessão da patente

#16.1

12/27/1983

RPI 688

Notificação para pagamento de retribuição

#13.1

10/04/1983

RPI 676

Deferimento

#9.1

06/14/1983

RPI 660

Exigência - art. 36 da LPI

#6.1

02/16/1983

RPI 643

21.5

07/06/1993

RPI 1179

Carta-patente expirada

#21.1

06/29/1993

RPI 1178

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