Official data from INPI

APERFEICOAMENTOS EM E REFERENTE A ANTENA DO TIPO HELICOIDAL

Em AnáliseInvention Patent

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Application data

Number

PI7500557

Type

Invention Patent

Filing

01/29/1975

Publication

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Progress at the INPI

Filing01/29/75
Publication
Examination
Allowance
Grant07/26/83
Expired09/21/93

The letters patent expired on 09/21/1993: 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: 01/22/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

A. S. (pessoa física)

Inventors

E. B. (pessoa física)

Technical data

IPC Classification

H01Q 11/08

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

01/22/1985

RPI 744

Concessão da patente

#16.1

07/26/1983

RPI 666

Notificação para pagamento de retribuição

#13.1

05/17/1983

RPI 656

110

01/11/1983

RPI 638

120

05/04/1982

RPI 602

120

02/02/1982

RPI 589

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

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