Official data from INPI

PROCESSO PARA O TRATAMENTO DE LAMA RESIDUAL, E, APARELHO PARA O TRATAMENTO DE LAMA RESIDUAL

PublicadaInvention Patent

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Application data

Number

PI8801529

Type

Invention Patent

Filing

03/30/1988

Publication

11/08/1988

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Progress at the INPI

Filing03/30/88
Publication11/08/88
Examination01/02/91
Allowance12/31/96
Grant08/26/97
Expired08/26/08

The letters patent expired on 08/26/2008: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 11/08/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Haden Drysys International Limited

HMH Process Engineering & Services Limited

Inventors

A. S. (pessoa física)

J. J. (pessoa física)

Technical data

IPC Classification

C02F 1/40

Priority claims

033,184 · 04/02/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

11/08/1988

RPI 942

Carta-patente expirada

#21.1

Patente extinta em 30/03/2008

08/26/2008

RPI 1964

Concessão da patente

#16.1

08/26/1997

RPI 1395

Notificação para pagamento de retribuição

#13.1

05/06/1997

RPI 1379

Deferimento

#9.1

12/31/1996

RPI 1361

14.11

09/17/1996

RPI 1346

14.4

04/09/1996

RPI 1323

Exigência - art. 36 da LPI

#6.1

09/19/1995

RPI 1294

Solicitação de exame técnico

#4.1

01/02/1991

RPI 1048

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