Official data from INPI

POLIMEROS,PROCESSO PARA SUA OBTENCAO,E APLICADOR DE AGENTE ATIVO

Concessão AnuladaInvention Patent

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Application data

Number

PI7600499

Type

Invention Patent

Filing

01/28/1975

Publication

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Progress at the INPI

Filing01/28/75
Publication
Examination
Allowance
Grant
Expired07/27/93

The letters patent expired on 07/27/1993: 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: 04/27/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ALZA CORP

Inventors

C. N. (pessoa física)

H. J. (pessoa física)

Technical data

IPC Classification

C08G 65/28 C08G 67/00 C08L 101/00 C08L 101/16 C08L 23/00 C08L 51/00 C08L 51/02 C08L 67/00 C08L 77/00

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

16.3

04/27/1982

RPI 601

Carta-patente expirada

#21.1

07/27/1993

RPI 1182

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