Research/Patents/US 4720355

US 4720355ACTIVE SECRECY ORDER

ORGANIC NONLINEAR OPTICAL SUBSTRATES

Assignee

HOECHST CELANESE CORPORATION

Filed

Mar 4, 1986

Granted

Jan 19, 1988

Location

WAYNE NJ US

Abstract

This invention provides organic solid solutions which exhibit nonlinear optical properties. Illustrative of the invention is an optically clear solid solution of poly(N,N-dimethylacrylamide) and 13,13-di(n-hexydecylamino)-14,14-dicyano-4,5,9,10-tetrahydropyrenoquinodimethane.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Jun 2, 1986

Rescinded

Never rescinded

Duration

40y 0mo — still active

This secrecy order has no recorded rescission date in USPTO records. The order may still be legally in force, or rescission data may not be publicly available.

Inventor

1RONALD N. DE MARTINO

Technology Domains

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External Sources

Google Patents — US 4720355 USPTO Full Patent (PDF)All active secrecy orders

Record Details

Patent number: US 4720355
Application: 06836132
Aerospace match: Yes
Dataset source: 35 USC §181 SO records

Browse by Assignee

HOECHST CELANESE CORPORATION

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records