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Official data from INPI

PROCESSO PARA PRODUCAO DE UMA BLINDAGEM SUPRESSORA DE DESCARGA CORONA ISOLANTE PARA UMA EMENDA DE UM CABO DE ALTA TENSAO

ConcedidaInvention Patent

Application data

Number

PI7905724

Type

Invention Patent

Filing

09/07/1978

Publication

-

Progress at the INPI

  1. Filing09/07/78
  2. Publication
  3. Examination06/15/82
  4. Allowance01/11/83
  5. Grant08/30/83
  6. Expired04/25/95

The letters patent expired on 04/25/1995: 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: 08/30/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MINNESOTA MINING & MFG

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Inventors

H. H. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/30/1983

RPI 671

Notificação para pagamento de retribuição

#13.1

05/24/1983

RPI 657

Deferimento

#9.1

01/11/1983

RPI 638

Solicitação de exame técnico

#4.1

06/15/1982

RPI 608

Carta-patente expirada

#21.1

04/25/1995

RPI 1273

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