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Official data from INPI

DISPOSICAO CONSTRUTIVA EM VALVULA DE DESCARGA PARA SILOS E SIMILARES

ConcedidaUtility Model

Application data

Number

MU6301628

Type

Utility Model

Filing

11/07/1983

Publication

01/17/1984

Progress at the INPI

  1. Filing11/07/83
  2. Publication01/17/84
  3. Examination03/20/84
  4. Allowance08/26/86
  5. Grant06/30/87
  6. Expired09/27/94

The letters patent expired on 09/27/1994: 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: 06/30/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

PIZZOLI IND & COMERCIO [BR]

Inventors

P. E. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/30/1987

RPI 871

Notificação para pagamento de retribuição

#13.1

12/09/1986

RPI 842

Deferimento

#9.1

08/26/1986

RPI 827

Republicação - classificação IPC

#15.11

11/19/1985

RPI 787

Exigência - art. 36 da LPI

#6.1

11/19/1985

RPI 787

Solicitação de exame técnico

#4.1

03/20/1984

RPI 700

Publicação antecipada

#3.2

01/17/1984

RPI 691

Pedido de patente depositado

#2.1

01/10/1984

RPI 690

Carta-patente expirada

#21.1

09/27/1994

RPI 1243

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