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Official data from INPI

FILTRO DE ÓLEO, ESPECIALMENTE PARA CHAVES GRADATIVAS DE TRANSFORMADORES GRADATIVOS

Arquivada/ExtintaInvention Patent
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Application data

Number

PI9103824

Type

Invention Patent

Filing

09/04/1991

Publication

05/19/1992
View on INPI

Progress at the INPI

  1. Filing09/04/91
  2. Publication05/19/92
  3. Examination10/06/92
  4. Allowance10/06/98
  5. Grant02/23/99
  6. Expired06/11/13

The letters patent expired on 06/11/2013: 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: 03/27/2018. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

M. R. (pessoa física)

DE

Inventors

K. S. (pessoa física)

DE

Technical data

IPC Classification

H01F 27/14H01H 9/00

Priority claims

DE

P 4033172.5-32 · 10/19/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. A classificação IPC anterior era H01F 15/02.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

Patente extinte em 04/09/2011

06/11/2013

RPI 2214

Concessão da patente

#16.1

02/23/1999

RPI 1468

Deferimento

#9.1

10/06/1998

RPI 1450

Solicitação de exame técnico

#4.1

10/06/1992

RPI 1140

Publicação do pedido de patente

#3.1

05/19/1992

RPI 1120

Pedido de patente depositado

#2.1

10/15/1991

RPI 1089

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