US3317606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating vicinal and nonvicinal toluene diamines
Assignee: Lummus Technology LLC
•
Filing: 1963-05-21
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Granted: 1967-05-02
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Expires: 1983-05-21
Abstract
No abstract record available.
Inventors
- 👤 Benjamin J Luberoff
- 👤 Daniel H Gold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:32
CPC Classifications
C; C07; C07C; C07C263/00; C07C263/10; C07C209/00; C07C209/82; C07C209/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS FOR SEPARATING A NON-VICINAL TOLUENE DIAMINE FROM A DIAMINE SOLUTION CONTAINING A MIXTURE OF VICINAL AND NON-VICINAL TOLUENE DIAMINES COMPRISING: A. EXTRACTING THE VICINAL TOLUENE DIAMINE FROM THE DIAMINE SOLUTION WITH AN UNSATURATED SOLUTION OF A METALLIC COMPOUND, SAID SOLUTION CONTAINING A CONCENTRATION OF METALLIC COMPOUND THAT IS AT LEAST 10 PERCENT OF THE SATURATION CONCENTRATION, SAID DIAMINE SOLUTION AND SAID SOLUTION CONTAINING A METALLIC COMPOUND BEING SUBSTANTIALLY IMMISCIBVLE WITH EACH OTHER, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF METALS HAVING ATOMIC NUMBER 22 THROUGH 30 AND 40 THROUGH 48. B. SEPARATING THE METALLIC COMPOUND SOLUTION CONTAINING EXTRACTED VICINAL TOLUENE DIAMINE FROM THE DIAMINE SOLUTION, AND C. RECOVERING NON-VICINAL TOLUENE DIAMINE FROM THE DIAMINE SOLUTION.
Claim 2
Dependent Claim
119 words
A PROCESS FOR SEPARATING A NON-VICINAL TOLUENE DIAMINE FROM A DIAMINE SOLUTION CONTAINING A MIXTURE OF VICINAL AND NON-VICINAL TOLUENE DIAMINES COMPRISING: A. EXTRACTING THE VICINAL TOLUENE DIAMINE FROM THE DIAMINE SOLUTION WITH AN UNSATURATED SOLUTION OF A METALLIC COMPOUND, SAID SOLUTION CONTAINING A CONCENTRATION OF METALLIC COMPOUND THAT IS AT LEAST 10 PERCENT OF THE SATURATION CONCENTRATION, SAID DIAMINE SOLUTION AND SAID SOLUTION CONTAINING A METALLIC COMPOUND BEING SUBSTANTIALLY IMMISCIBVLE WITH EACH OTHER, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF METALS HAVING ATOMIC NUMBER 22 THROUGH 30 AND 40 THROUGH 48. B. SEPARATING THE METALLIC COMPOUND SOLUTION CONTAINING EXTRACTED VICINAL TOLUENE DIAMINE FROM THE DIAMINE SOLUTION, AND C. RECOVERING NON-VICINAL TOLUENE DIAMINE FROM THE DIAMINE SOLUTION.
References Cited (Backward Citations)
GB328418A
Cited
US2795597A
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GB795639A
Cited
US2946821A
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US2946822A
Cited
US2831012A
Cited
US3076005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |