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Official data from INPI

PROCESSO PARA ELEVAR A PRODUCAO DE OLEO POR INUNDACAO DE HIDROCARBONETOS DE PETROLEO DE DEPOSITOS DE PETROLEO,AREIAS E XISTO OLEOSO POR MEIO DE DISPERSOES DE SUBSTANCIAS NAO IONOGENEAS TENSO-ATIVAS EM AGUA

Em AnáliseInvention Patent

Application data

Number

PI7706804

Type

Invention Patent

Filing

10/15/1976

Publication

-

Progress at the INPI

  1. Filing10/15/76
  2. Publication
  3. Examination
  4. Allowance05/31/83
  5. Grant12/27/83
  6. Terminated12/15/87

The patent was granted on 12/27/1983 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 12/15/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

BIOTECHNOLOG FORSCHUNG GMBH

WINTERSHALL AG

Inventors

G. W. (pessoa física)

L. W. (pessoa física)

R. P. (pessoa física)

S. W. (pessoa física)

W. F. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Anuidade - prazo legal encerrado

#18.2

12/15/1987

RPI 895

Concessão da patente

#16.1

12/27/1983

RPI 688

Notificação para pagamento de retribuição

#13.1

09/27/1983

RPI 675

Deferimento

#9.1

05/31/1983

RPI 658

Exigência - art. 36 da LPI

#6.1

08/17/1982

RPI 617

6.2

10/06/1981

RPI 572

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