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US2493549A Expired / Lapsed US ⏱️ 0.0 years remaining

Preparation of basic lead salts of 2:4 dinitro resorcinol

Assignee: Imperial Chemical Industries Ltd
•
Filing: 1947-07-08
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Granted: 1950-01-03
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Expires: 1967-07-08
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Abstract

No abstract record available.

Inventors

  • 👤 Rubenstein Leon

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 06:30
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/003; C07C; C07C201/00; C07C201/06; C07C201/12

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 164 words
A PROCESS FOR THE PRODUCTION OF A SUBSTANTIALLY MONOBASIC LEAD SALT OF 2:4 DINITRORESORCINOL IN WHICH ARE INCLUDED THE STEPS OF FORMING A PRECIPITATE OF THIS LEAD SALT IN A GLASS VESSEL BY REACTING A SOLUTION OF A SOLUBLE NORMAL LEAD SALT WITH AN ALKALINE SOLUTION OF 2:4 DINITRORESORCINOL WITH AN ALKALINE SOLUTION OF 2:4 DINITZORESORCINOL AT A RASIED TEMPERATURE GRADUALLY ADDING A AT A RAISED TEMPERATURE, GRADUALLY ADDING A SMALL AMOUNT OF A DILUTE SOLUTION OF AN ACID, THE LEAD SALT OF WHICH IS SOLUBLE, DEMEANING THE LIQUOR, LEAD SALT OF WHICH IS SOLUBLE, DECANTING THE LIQUOR, REMOVING THE MONOBASIC LEAD SALT OF 2:4 DINITRORESORCINATE, EXCLUDING ANY OF THE PRECIPITATE OF THE INACTIVE NITROGEN FREE LEAD COMPOUND WHICH IS INACTIVE NIGROGEN FREE LEAD COMPOUND WHICH IS DISTINGUISHABLE BY ITS COLOR AND ADHERENCE TO THE BASE OF THE VESSLE, AND WASHING THE PRECIPITATE BASE OF THE VESSEL, AND WASHING THE PRECIPITATE THUS REMOVED FREE FROM THE SOLUBLE SALTS FORMED AS BY-PRODUCTS OF THE PRECIPITATION.

References Cited (Backward Citations)

GB192830A Cited
US2116514A Cited
US2177657A Cited
US2226391A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1953-01-02 1953-07-04 1954-01-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1957-01-02 1957-07-04 1958-01-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1961-01-02 1961-07-04 1962-01-03 $7700.00 Window Closed / Lapsed

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