US3914266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper complex
Assignee: General Electric Co
•
Filing: 1974-02-11
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Granted: 1975-10-21
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Expires: 1994-02-11
Abstract
Abstract Cuprous bromide and cupric bromide form a 1 to 1 molar complex with N,N''-disubstituted alkylene or cycloalkylene diamines having from 2-3 carbon atoms between the two nitrogen atoms and whose two substituents on the two nitrogens are isopropyl or Alpha tertiary alkyl. These complexes have been found to have unique properties as catalysts in the oxidative coupling of phenols to polyphenylene oxides in solvent systems heretofore requiring removal of the water formed as a by-product during the reaction.
Inventors
- 👤 Allan S Hay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:28
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/44
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
38 words
A CRYSTALLINE, COPPER SALT COMPLEX WITH AN AMINE WHEREIN THE MOLAR RATIO IS ONE MOLE OF COPPER SALT TO ONE MOLE OF AMINE, THE COPPER SALT IS CUPROUS BROMIDE OR CUPRIC BROMIDE AND THE AMINE HAS THE FORMULA:
Claim 2
Dependent Claim
38 words
A CRYSTALLINE, COPPER SALT COMPLEX WITH AN AMINE WHEREIN THE MOLAR RATIO IS ONE MOLE OF COPPER SALT TO ONE MOLE OF AMINE, THE COPPER SALT IS CUPROUS BROMIDE OR CUPRIC BROMIDE AND THE AMINE HAS THE FORMULA:
Claim 3
Dependent Claim
46 words
A composition in accordance with claim 1, wherein each R'' is independently isopropyl, a C4-8-tertiary alkyl or cyclo-alkyl group in which only the Alpha -carbon atom has no hydrogens, there being at least two and no more than three carbon atoms separating the two nitrogen atoms.
Claim 4
Dependent Claim
17 words
The complex of claim 2, wherein R is 1,2-alkylene or 1,2-cycloalkylene and each R'' is tertiary alkyl.
Claim 5
Dependent Claim
9 words
The complex of claim 3, wherein R is 1,2-alkylene.
Claim 6
Dependent Claim
11 words
The complex of claim 2, wherein each R'' is tertiary butyl.
Claim 7
Dependent Claim
12 words
The complex of claim 2, wherein the copper salt is cupric bromide.
Claim 8
Dependent Claim
15 words
The complex of claim 6, wherein R is 1,2-alkylene and each R'' is tertiary butyl.
Claim 9
Dependent Claim
15 words
The complex of claim 6, wherein R is ethylene and each R'' is tertiary butyl.
Claim 10
Dependent Claim
12 words
The complex of claim 2, wherein the copper salt is cuprous bromide.
Claim 11
Dependent Claim
15 words
The complex of claim 9, wherein R is 1,2-alkylene and each R'' is tertiary butyl.
Claim 12
Dependent Claim
15 words
The complex of claim 9, wherein R is ethylene and each R'' is tertiary butyl.
References Cited (Backward Citations)
US2686798A
Cited
US2977279A
Cited
US2924551A
Cited
US2924552A
Cited
US2928856A
Cited
US3038904A
Cited
US3254126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |