Official data from INPI

PONTA DE DENTE ESCAVADOR ESPECIALMENTE ADAPTADA PARA RESISTIR A TENSOES DE ELEVACAO REPETITIVAS

Em AnáliseInvention Patent

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Application data

Number

PI7800858

Type

Invention Patent

Filing

02/18/1977

Publication

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Progress at the INPI

Filing02/18/77
Publication
Examination
Allowance04/20/82
Grant
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: 08/10/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ESCO CORP

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

08/10/1982

RPI 616

Deferimento

#9.1

04/20/1982

RPI 600

6.2

11/03/1981

RPI 576

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

20.4

11/06/1990

RPI 1040

Pedido de licença compulsória

#20.1

10/30/1990

RPI 1039

From the same holder

APERFEICOAMENTO EM VALVULA ROTATIVA DE ALIMENTACAO

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