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Official data from INPI

APERFEIÇOAMENTOS EM BIODIGESTOR ANAERÓBIO DE FLUXO ASCENDENTE.

Em AnáliseInvention Patent

Application data

Number

PI8502133

Type

Invention Patent

Filing

05/06/1985

Publication

12/09/1986

Progress at the INPI

  1. Filing05/06/85
  2. Publication12/09/86
  3. Examination03/31/87
  4. Allowance01/23/90
  5. Grant09/25/90
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 03/31/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

CETESB -Companhia de Tecnologia de Saneamento Ambiental

SP, BR

Inventors

M. S. (pessoa física)

BR

S. V. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

03/31/1987

RPI 858

Publicação do pedido de patente

#3.1

12/09/1986

RPI 842

Pedido de patente depositado

#2.1

07/09/1985

RPI 768

Carta-patente expirada

#21.1

Patente extinta em 06/05/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

09/25/1990

RPI 1034

Notificação para pagamento de retribuição

#13.1

05/22/1990

RPI 1019

Deferimento

#9.1

01/23/1990

RPI 1003

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