US2632023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing 2, 5-diamino-2, 5-dimethylhexane
Assignee: Rohm and Haas Co
•
Filing: 1950-07-07
•
Granted: 1953-03-17
•
Expires: 1970-07-07
Abstract
No abstract record available.
Inventors
- 👤 Newman M Bortnick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:00
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS FOR PREPARING 2,5-DIAMINO-2,5DIMETHYLHEXANE WHICH CONSISTS OF FIRST MIXING AT A TEMPERATURE OF 15*-50* C. ONE MOLE OF BIMETHALLYL, 2 TO 3 MOLES OF HYDROGEN CYANIDE, 1.5 TO 5.0 MOLES OF SULFURIC ACID AND WATER IN AN AMOUNT EQUAL TO 0.1 TO 5 TIMES THE WEIGHT OF SAID SULFURIC ACID, HEATING THE RESULTANT AQUEOUS MIXTURE AT 40*-80* C. TO FORM 2,5-DIFORMAMIDO-2,5-DIMETHYLHEXANE, THEN CONTINUING HEATING FROM 80* C. TO THE REFLUXING TEMPERATURE IN THE PRESENCE OF WATER TOTALLING ONE TO NINE TIMES THE WEIGHT OF SAID SULFURIC ACID, NEUTRALIZING THE RESULTANT MIXTURE WITH A STRONG BASE, AND FINALLY ISOLATING SAID 2,5-DIAMINO-2,5DIMETHYLHEXANE.
Claim 2
Dependent Claim
101 words
A PROCESS FOR PREPARING 2,5-DIAMINO-2,5DIMETHYLHEXANE WHICH CONSISTS OF FIRST MIXING AT A TEMPERATURE OF 15*-50* C. ONE MOLE OF BIMETHALLYL, 2 TO 3 MOLES OF HYDROGEN CYANIDE, 1.5 TO 5.0 MOLES OF SULFURIC ACID AND WATER IN AN AMOUNT EQUAL TO 0.1 TO 5 TIMES THE WEIGHT OF SAID SULFURIC ACID, HEATING THE RESULTANT AQUEOUS MIXTURE AT 40*-80* C. TO FORM 2,5-DIFORMAMIDO-2,5-DIMETHYLHEXANE, THEN CONTINUING HEATING FROM 80* C. TO THE REFLUXING TEMPERATURE IN THE PRESENCE OF WATER TOTALLING ONE TO NINE TIMES THE WEIGHT OF SAID SULFURIC ACID, NEUTRALIZING THE RESULTANT MIXTURE WITH A STRONG BASE, AND FINALLY ISOLATING SAID 2,5-DIAMINO-2,5DIMETHYLHEXANE.
References Cited (Backward Citations)
US2457660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |