Official data from INPI

APARELHO TROCADOR DE CALOR

Em AnáliseInvention Patent

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Application data

Number

PI7807656

Type

Invention Patent

Filing

11/23/1977

Publication

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Progress at the INPI

Filing11/23/77
Publication
Examination
Allowance04/06/82
Grant
Expired05/24/94

The letters patent expired on 05/24/1994: 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: 07/27/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

A. P. (pessoa física)

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Inventors

No inventors listed.

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Notificação para pagamento de retribuição

#13.1

07/27/1982

RPI 614

Deferimento

#9.1

04/06/1982

RPI 598

Carta-patente expirada

#21.1

05/24/1994

RPI 1225

From the same holder

APARELHO PERMUTADOR TERMICO REGENERATIVO GIRATORIO APARELHO TROCADOR DE CALOR APARELHO TROCADOR DE CALOR REGENERATIVO ROTATIVO APARELHO TROCADOR DE CALOR APARELHO PARA A FILTRAGEM DE MATERIAL EM PARTICULAS APARELHO TROCADOR DE CALOR APARELHO PERMUTADOR DE CALOR

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