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Official data from INPI

DISPOSITIVO DE REGULAÇÃO DO ESCOAMENTO E EMISSOR DE IRRIGAÇÃO

PublicadaInvention Patent

Application data

Number

PI8706123

Type

Invention Patent

Filing

11/12/1987

Publication

06/14/1988

Progress at the INPI

  1. Filing11/12/87
  2. Publication06/14/88
  3. Examination09/11/90
  4. Allowance08/25/92
  5. Grant04/27/93
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 06/14/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Silkbell Limited

HK

Inventors

L. H. (pessoa física)

ZA

Technical data

IPC Classification

Priority claims

ZA

86/8587 · 11/12/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

06/14/1988

RPI 921

Pedido de patente depositado

#2.1

02/23/1988

RPI 905

Carta-patente expirada

#21.1

Patente extinta em 12/11/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

04/27/1993

RPI 1169

Notificação para pagamento de retribuição

#13.1

12/29/1992

RPI 1152

Deferimento

#9.1

08/25/1992

RPI 1134

Exigência - art. 36 da LPI

#6.1

12/24/1991

RPI 1099

Solicitação de exame técnico

#4.1

09/11/1990

RPI 1032

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