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Official data from INPI

PROCESSO PARA TRATAMENTO DE LAMA DE ÁGUAS SERVIDAS

PublicadaInvention Patent

Application data

Number

PI8900379

Type

Invention Patent

Filing

01/30/1989

Publication

09/26/1989

Progress at the INPI

  1. Filing01/30/89
  2. Publication09/26/89
  3. Examination04/09/91
  4. Allowance12/20/94
  5. Grant08/29/95
  6. Expired12/15/09

The letters patent expired on 12/15/2009: 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: 09/26/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

N-Viro Energy Systems Ltd

US

Inventors

J. B. (pessoa física)

US

J. N. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

149.575 · 01/28/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

09/26/1989

RPI 988

Pedido de patente depositado

#2.1

03/21/1989

RPI 961

Carta-patente expirada

#21.1

Patente extinta em 30/01/2004

12/15/2009

RPI 2032

Concessão da patente

#16.1

08/29/1995

RPI 1291

Notificação para pagamento de retribuição

#13.1

05/09/1995

RPI 1275

Deferimento

#9.1

12/20/1994

RPI 1255

Solicitação de exame técnico

#4.1

04/09/1991

RPI 1062

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