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Official data from INPI

ISOLADOR ELETRICO E TRILHO PARA ESTRADA DE FERRO

ConcedidaInvention Patent

Application data

Number

PI7700918

Type

Invention Patent

Filing

02/15/1977

Publication

-

Progress at the INPI

  1. Filing02/15/77
  2. Publication
  3. Examination
  4. Allowance
  5. Grant09/27/83
  6. Expired07/27/93

The letters patent expired on 07/27/1993: 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: 09/27/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

PANDROL LTD

Inventors

G. E. (pessoa física)

S. D. (pessoa física)

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/27/1983

RPI 675

110

06/14/1983

RPI 660

120

01/04/1983

RPI 637

Recurso

#12.1

02/09/1982

RPI 590

Carta-patente expirada

#21.1

07/27/1993

RPI 1182

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