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Official data from INPI

APERFEICOAMENTOS EM UM APARELHO DE RESFRIAMENTO DE LIQUIDOS DO TIPO INJETOR

ConcedidaInvention Patent

Application data

Number

PI7501122

Type

Invention Patent

Filing

03/06/1974

Publication

-

Progress at the INPI

  1. Filing03/06/74
  2. Publication
  3. Examination
  4. Allowance
  5. Grant12/29/81
  6. Expired08/03/93

The letters patent expired on 08/03/1993: 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: 12/29/1981. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

BALTIMORE AIRCOIL CO INC

Inventors

B. W. (pessoa física)

E. J. (pessoa física)

S. E. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/29/1981

RPI 584

Carta-patente expirada

#21.1

08/03/1993

RPI 1183

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