US3205154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of diamines
Assignee: Millennium Petrochemicals Inc
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Filing: 1961-01-17
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Granted: 1965-09-07
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Expires: 1981-01-17
Abstract
No abstract record available.
Inventors
- 👤 Irving L Mador
- 👤 Louis J Rekers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:34
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A PROCESS FOR PREPARING DIAMINO DIMERS OF A LOWER MOLECULAR WEIGHT ALIPHATIC CONJUGATED DIOLEFINIC HYDROCARBON BY MAINTAINING IN LIQUID PHASE A REACTION MIXTURE COMPRISING A LOWER MOLECULAR WEIGHT ALIPHATIC CONJUGATED DIOLEFINIC HYDROCARBON AND, IN SAID MIXTURE, REACTING A HYDROXYLAMINE WITH A SALT OF A MULTIVALENT METAL THAT REDUCES SAID HYDROXYLAMINE WHREBY THE METAL SALT IS OXIDIZED TO A HIGHER VALENT NON-REDUCING FORM, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID REACTION IN AN ELECTROLYTIC CELL AT A CURRENT DESITY OF FROM ABOUT 0.01 TO ABOUT 0.5 AMPERE/CM.2 TO REDUCE IN SITU TO REDUCING FORM THE METAL THAT IS OXIDIZED IN REDUCTION OF THE HYDROXYLAMINE, THE REACTION MIXTURE CONTAINING FROM ONE TO TWENTY MOLE PERCENT OF THE METAL SALT BASED ON THE AMOUNT OF HYDROXYLAMINE AND, IN RATIO OF EQUIVALENTS, FROM ABOUT ONE TO ABOUT EIGHT OF THE DIOLEFIN TO ONE OF THE HYDROXYLAMINE.
Claim 2
Dependent Claim
143 words
IN A PROCESS FOR PREPARING DIAMINO DIMERS OF A LOWER MOLECULAR WEIGHT ALIPHATIC CONJUGATED DIOLEFINIC HYDROCARBON BY MAINTAINING IN LIQUID PHASE A REACTION MIXTURE COMPRISING A LOWER MOLECULAR WEIGHT ALIPHATIC CONJUGATED DIOLEFINIC HYDROCARBON AND, IN SAID MIXTURE, REACTING A HYDROXYLAMINE WITH A SALT OF A MULTIVALENT METAL THAT REDUCES SAID HYDROXYLAMINE WHREBY THE METAL SALT IS OXIDIZED TO A HIGHER VALENT NON-REDUCING FORM, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID REACTION IN AN ELECTROLYTIC CELL AT A CURRENT DESITY OF FROM ABOUT 0.01 TO ABOUT 0.5 AMPERE/CM.2 TO REDUCE IN SITU TO REDUCING FORM THE METAL THAT IS OXIDIZED IN REDUCTION OF THE HYDROXYLAMINE, THE REACTION MIXTURE CONTAINING FROM ONE TO TWENTY MOLE PERCENT OF THE METAL SALT BASED ON THE AMOUNT OF HYDROXYLAMINE AND, IN RATIO OF EQUIVALENTS, FROM ABOUT ONE TO ABOUT EIGHT OF THE DIOLEFIN TO ONE OF THE HYDROXYLAMINE.
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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |