Patent US3418372A successfully refreshed from Google Patents.
US3418372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 2,2',4,4',6,6'-hexanitrodiphenylamine
Assignee: United States Department of the Navy
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Filing: 1960-01-29
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Granted: 1968-12-24
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Expires: 1980-01-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Francis Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:45
CPC Classifications
C; C06; C06B; C06B25/00; C06B25/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE METHOD OF PREPARING 2,2'',4,4'' - HEXANITRODIPHENYLAMINE OF A PURITY AT LEAST 99.7 MOLE PERCENT WHICH COMPRISES THE STEPS OF MIXING HEXANITRODIPHENYLAMINE WITH ACETONE TO FORM A SLURRY, DISSOLVING POTASSIUM ACETATE IN ABOUT A TWO TO ONE MIXTURE OF ALCOHOL AND ACETONE TO FORM A FIRST SOLUTION, ADDING THE FIRST SOLUTION TO THE SUSPENSION, TO FORM A SECOND SOLUTION, ADDING SUFFICIENT WATER TO THE SECOND SOLUTION TO CAUSE THE MIXTURE TO BECOME TURBID, CHILLING THE MIXTURE, AND RECOVERING POTASSIUM 2,2'',4,4'', 6,6''-HEXANITRODIPHENYLAMINE AS A PREDIPITATE.
Claim 2
Independent Claim
84 words
THE METHOD OF PREPARING 2,2'',4,4'' - HEXANITRODIPHENYLAMINE OF A PURITY AT LEAST 99.7 MOLE PERCENT WHICH COMPRISES THE STEPS OF MIXING HEXANITRODIPHENYLAMINE WITH ACETONE TO FORM A SLURRY, DISSOLVING POTASSIUM ACETATE IN ABOUT A TWO TO ONE MIXTURE OF ALCOHOL AND ACETONE TO FORM A FIRST SOLUTION, ADDING THE FIRST SOLUTION TO THE SUSPENSION, TO FORM A SECOND SOLUTION, ADDING SUFFICIENT WATER TO THE SECOND SOLUTION TO CAUSE THE MIXTURE TO BECOME TURBID, CHILLING THE MIXTURE, AND RECOVERING POTASSIUM 2,2'',4,4'', 6,6''-HEXANITRODIPHENYLAMINE AS A PREDIPITATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |