US3232990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for n,n-dialkylhydroxylamines
Assignee: Pennwalt Corp
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Filing: 1962-06-13
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Granted: 1966-02-01
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Expires: 1982-06-13
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Deger
- 👤 Harry E Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:38
CPC Classifications
C; C07; C07C; C07C239/00; C07C239/08; C07C239/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
IN THE PROCESS OF PYROLYZING A TRIALKYLAMINE OXIDE TO AN N,N-DIALKYLHYDROXYLAMINE WHEREIN THE ALKYL GROUPS OF SAID HYDROXYLAMINE CONTAIN FROM 1 TO 12 CARBON ATOMS, THE IMPROVEMENT WHICH COMPRISES BRINGING SAID AMINE OXIDE IN THE DIRECT HEAT EXCHANGE RELATIONSHIP WITH AN INERT LIQUID BOILING ABOVE ABOUT 250*C. AND SELECTED FROM THE CLASS CONSISTING OF PARAFFIN OIL, KEROSENE, MINERAL OIL, HEAVY AROMATIC NAPHTHA, TRIETHYLENE GLYCOL, TRIPROPYLENE, POLYETHYLENE GLYCOL, THE DIBUTYLETHER OF DIETHYLENE GLYCOL, CHLORINATED BIPHENYL, DIOCTYLPHTHALATE, SUCROSE OCTAACETATE, ETHYL-3-FORMYL-2, 5-ENDOMETHYLENE-3-CYCLOHEXANE-CARBOXYLATE, AND TETRA(2-ETHYLHEXYL)SILICATE, HELD AT A TEMPERATURE BETWEEN ABOUT 85*C. AND ABOUT 135* C. AND REMOVING SAID DIALKYLHYDROXYLAMINE PRODUCT FROM THE REACTION ZONE.
Claim 2
Dependent Claim
101 words
IN THE PROCESS OF PYROLYZING A TRIALKYLAMINE OXIDE TO AN N,N-DIALKYLHYDROXYLAMINE WHEREIN THE ALKYL GROUPS OF SAID HYDROXYLAMINE CONTAIN FROM 1 TO 12 CARBON ATOMS, THE IMPROVEMENT WHICH COMPRISES BRINGING SAID AMINE OXIDE IN THE DIRECT HEAT EXCHANGE RELATIONSHIP WITH AN INERT LIQUID BOILING ABOVE ABOUT 250*C. AND SELECTED FROM THE CLASS CONSISTING OF PARAFFIN OIL, KEROSENE, MINERAL OIL, HEAVY AROMATIC NAPHTHA, TRIETHYLENE GLYCOL, TRIPROPYLENE, POLYETHYLENE GLYCOL, THE DIBUTYLETHER OF DIETHYLENE GLYCOL, CHLORINATED BIPHENYL, DIOCTYLPHTHALATE, SUCROSE OCTAACETATE, ETHYL-3-FORMYL-2, 5-ENDOMETHYLENE-3-CYCLOHEXANE-CARBOXYLATE, AND TETRA(2-ETHYLHEXYL)SILICATE, HELD AT A TEMPERATURE BETWEEN ABOUT 85*C. AND ABOUT 135* C. AND REMOVING SAID DIALKYLHYDROXYLAMINE PRODUCT FROM THE REACTION ZONE.
References Cited (Backward Citations)
US2810681A
Cited
US2884362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |