US2976333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aromatic compounds
Assignee: Wyeth Holdings LLC
•
Filing: 1954-06-23
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Granted: 1961-03-21
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Expires: 1974-06-23
Abstract
No abstract record available.
Inventors
- 👤 Dixon James Kenneth
- 👤 Smolin Edwin Marvin
- 👤 Saunders Kenneth Worden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:36
CPC Classifications
C; C07; C07C; C07C4/00; C07C2521/00; C07C2521/02; C07C2521/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
A PROCESS OF PRODUCING A PLURALITY OF AROMATIC COMPOUNDS WHICH COMPRISES MIXING AN ASYMMETRIC DIARYLETHANE WITH A DULUENT, CONTACTING THE RESULTING MIXTURE THEREOF WITH BORON OXIDE-ALUMINA CATALYST AND MAINTAINING THE TEMPERATURE OF SAID MIXTURE AT A TEMPERATURE WHICH WILL CAUSE SAID ASYMMETRIC DIARYLETHANE TO DECOMPOSE INTO A PLURALITY OF AROMATIC COMPOUNDS IN THE PRESENCE OF CATALYST AND WHICH IS AT LEAST 350$C. DURING THE CONTACT TIME WITH SAID CATALYST OF BETWEEN ABOUT 0.001 SECOND AND ABOUT 0.8 SECOND.
Claim 2
Dependent Claim
78 words
A PROCESS OF PRODUCING A PLURALITY OF AROMATIC COMPOUNDS WHICH COMPRISES MIXING AN ASYMMETRIC DIARYLETHANE WITH A DULUENT, CONTACTING THE RESULTING MIXTURE THEREOF WITH BORON OXIDE-ALUMINA CATALYST AND MAINTAINING THE TEMPERATURE OF SAID MIXTURE AT A TEMPERATURE WHICH WILL CAUSE SAID ASYMMETRIC DIARYLETHANE TO DECOMPOSE INTO A PLURALITY OF AROMATIC COMPOUNDS IN THE PRESENCE OF CATALYST AND WHICH IS AT LEAST 350$C. DURING THE CONTACT TIME WITH SAID CATALYST OF BETWEEN ABOUT 0.001 SECOND AND ABOUT 0.8 SECOND.
Claim 3
Dependent Claim
38 words
A PROCESS FOR PRODUCING VINYL SUBSTITUTED ARYL COMPOUNDS WHICH COMPRISES HEATING AN ASYMMETRIC DIARYLETHANE AT A TEMPERATURE WHICH IS AT LEAST 350*C. AND WHICH WILL CAUSE SAID DIARYLETHANE TO DECOMPOSE IN THE PRESENCE OF A BORON OXIDE-ALUMINUM CATALYST.
Claim 4
Dependent Claim
38 words
A PROCESS FOR PRODUCING VINYL SUBSTITUTED ARYL COMPOUNDS WHICH COMPRISES HEATING AN ASYMMETRIC DIARYLETHANE AT A TEMPERATURE WHICH IS AT LEAST 350*C. AND WHICH WILL CAUSE SAID DIARYLETHANE TO DECOMPOSE IN THE PRESENCE OF A BORON OXIDE-ALUMINUM CATALYST.
References Cited (Backward Citations)
US2373982A
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US2356978A
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US2420688A
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US2425097A
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US2422165A
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US2422171A
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US2422318A
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US2653979A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |