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Official data from INPI

SEM TITULO

Em AnáliseInvention Patent
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Application data

Number

PI7403970

Type

Invention Patent

Filing

05/15/1974

Publication

-
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Progress at the INPI

  1. Filing05/15/74
  2. Publication
  3. Examination
  4. Allowance
  5. Grant01/09/79
  6. Expired11/17/92

The letters patent expired on 11/17/1992: 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: 12/13/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

T. L. (pessoa física)

SP, BR

Inventors

E. B. (pessoa física)

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

12/13/1988

RPI 947

Concessão da patente

#16.1

01/09/1979

RPI 429

Carta-patente expirada

#21.1

11/17/1992

RPI 1146

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