Official data from INPI

LENTE DE CONTATO E PROCESSO PARA SUA FORMACAO

ConcedidaInvention Patent

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Application data

Number

PI7804596

Type

Invention Patent

Filing

02/21/1978

Publication

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Progress at the INPI

Filing02/21/78
Publication
Examination
Allowance02/28/84
Grant08/28/84
Expired11/30/93

The letters patent expired on 11/30/1993: 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: 08/28/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

BAUSCH & LOMB

Inventors

D. W. (pessoa física)

S. K. (pessoa física)

V. M. (pessoa física)

Technical data

IPC Classification

C08F 220/10 C08F 299/08 C08G 77/00 C08G 77/20 C08L 83/00 C08L 83/14 G02B 1/04

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/28/1984

RPI 723

Notificação para pagamento de retribuição

#13.1

06/12/1984

RPI 712

Deferimento

#9.1

02/28/1984

RPI 697

Exigência - art. 36 da LPI

#6.1

03/22/1983

RPI 648

6.2

01/26/1982

RPI 588

Carta-patente expirada

#21.1

11/30/1993

RPI 1200

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