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US3337501A
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Manganese and cobalt salt-amine complex catalysts in polyphenylene ether formation
Assignee: Onderzoekings Instituut Research
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Filing: 1965-03-12
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Granted: 1967-08-22
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Expires: 1985-03-12
Abstract
No abstract record available.
Inventors
- 👤 Bussink Jan
- 👤 Otto Ernst Van Lohuizen
- 👤 Vollbracht Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:40
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
IN A PROCESS FOR THE PREPARATION OF HIGH MOLECULAR WEIGHT POLYARYLENE ETHERS BY REACTING A 2,6-DISUBSTITUTED PHENOL WITH OXYGEN IN T HE PRESENCE OF A COMPLEX METAL SALT-AMINE COMPOUND, THE IMPROVEMENT WHICH CONSISTS OF USING A COMPLEXING METAL SELECTED FROM THE CLASS CONSISTING OF MANGANESE AND COBALT, THERE BEING PRESENT NO CATALYZING AMOUND OF A COMPLEX COPPER, SALT-AMINE COMPOUND.
Claim 2
Dependent Claim
59 words
IN A PROCESS FOR THE PREPARATION OF HIGH MOLECULAR WEIGHT POLYARYLENE ETHERS BY REACTING A 2,6-DISUBSTITUTED PHENOL WITH OXYGEN IN T HE PRESENCE OF A COMPLEX METAL SALT-AMINE COMPOUND, THE IMPROVEMENT WHICH CONSISTS OF USING A COMPLEXING METAL SELECTED FROM THE CLASS CONSISTING OF MANGANESE AND COBALT, THERE BEING PRESENT NO CATALYZING AMOUND OF A COMPLEX COPPER, SALT-AMINE COMPOUND.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |