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Official data from INPI

CHUMBADOR DE DUPLA EXPANSAO

Em AnáliseUtility Model
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Application data

Number

MU6001139

Type

Utility Model

Filing

09/04/1980

Publication

05/04/1982
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Progress at the INPI

  1. Filing09/04/80
  2. Publication05/04/82
  3. Examination11/30/82
  4. Allowance02/14/84
  5. Grant11/27/84
  6. Expired12/07/93

The letters patent expired on 12/07/1993: 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: 01/21/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MECANICA WALSYWA LTD

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Inventors

C. J. (pessoa física)

N. C. (pessoa física)

Technical data

IPC Classification

F16B 13/12

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.7

01/21/1987

RPI 848

20.4

01/13/1987

RPI 847

Concessão da patente

#16.1

11/27/1984

RPI 736

Notificação para pagamento de retribuição

#13.1

06/05/1984

RPI 711

Deferimento

#9.1

02/14/1984

RPI 695

Exigência - art. 36 da LPI

#6.1

08/30/1983

RPI 671

Solicitação de exame técnico

#4.1

11/30/1982

RPI 632

Publicação do pedido de patente

#3.1

05/04/1982

RPI 602

Carta-patente expirada

#21.1

12/07/1993

RPI 1201

20.7

05/08/1990

RPI 1017

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