Official data from INPI

UNIDADE DISCRIMINADORA DIGITAL(UDD-101)

Em AnáliseInvention Patent

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Application data

Number

PI7801090

Type

Invention Patent

Filing

02/22/1978

Publication

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Progress at the INPI

Filing02/22/78
Publication
Examination
Allowance06/22/82
Grant
Expired07/20/93

The letters patent expired on 07/20/1993: 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: 10/05/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

SAO PAULO TELECOM TELESP SA

Inventors

No inventors listed.

Technical data

IPC Classification

H04M 15/14

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Notificação para pagamento de retribuição

#13.1

10/05/1982

RPI 624

Deferimento

#9.1

06/22/1982

RPI 609

15.0

02/16/1982

RPI 591

Exigência - art. 36 da LPI

#6.1

12/29/1981

RPI 584

Republicação - classificação IPC

#15.11

01/26/2010

RPI 2038

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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