US3043886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diarylmethanes
Assignee: Standard Oil Co
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Filing: 1959-08-21
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Granted: 1962-07-10
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Expires: 1979-08-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Carl Serres
- 👤 Ellis K Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:13
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/361; C07C6/00; C07C6/08; C07C6/12; C07C6/126; C07C2527/00; C07C2527/06; C07C2527/125; C07C2527/126; C07C2527/128
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE PROCESS FOR PREPARING DIARYLMETHANES WHICH COMPRISES REACTING A POLYARYLMETHANE HAVING THE FORMULA: A-CH2$NA WHEREIN A IS AN ARYL GROUP, AR IS A DIVALENT ARYLENE GROUP CORRESPONDING TO A AND N IS AN INTEGER FROM 1 TO 4 AND WHEREIN A AND AR ARE SELECTED FROM THE CLASS CONSISTING OF ARYL AND ARYLENE HYDROCARBON GROUPS AND HALOGENATED DERIVATIVES THEREOF WITH AN AROMATIC COMPOUND CORRESPONDING TO THE ARYL GROUP A IN THE PRESENCE OF A CATALYTICALLY EFFECTIVE AMOUNT OF A LEWIS ACID AND RECOVERING THE DIARYLMETHANE FORMED.
Claim 2
Dependent Claim
86 words
THE PROCESS FOR PREPARING DIARYLMETHANES WHICH COMPRISES REACTING A POLYARYLMETHANE HAVING THE FORMULA: A-CH2$NA WHEREIN A IS AN ARYL GROUP, AR IS A DIVALENT ARYLENE GROUP CORRESPONDING TO A AND N IS AN INTEGER FROM 1 TO 4 AND WHEREIN A AND AR ARE SELECTED FROM THE CLASS CONSISTING OF ARYL AND ARYLENE HYDROCARBON GROUPS AND HALOGENATED DERIVATIVES THEREOF WITH AN AROMATIC COMPOUND CORRESPONDING TO THE ARYL GROUP A IN THE PRESENCE OF A CATALYTICALLY EFFECTIVE AMOUNT OF A LEWIS ACID AND RECOVERING THE DIARYLMETHANE FORMED.
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) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |