US2846478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogen nuclear substituted diaryl paraffins
Assignee: Wyeth Holdings LLC
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Filing: 1954-09-17
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Granted: 1958-08-05
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Expires: 1974-09-17
Abstract
No abstract record available.
Inventors
- 👤 Smolin Edwin Marvin
- 👤 Saunders Kenneth Worden
- 👤 Donald R May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:29
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/26; C07C17/272; C07C17/275
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PROCESS FOR PREPARING A NUCLEAR HALOGENATED SUBSTITUTED 1,1-DIARYLETHANE WHICH COMPRISES REACTING A NUCLEAR HALOGENATED SUBSTITUTED ARYL COMPOUND OF THE BENZENE SERIES HAVING AT LEAST ONE HYDROGEN ATOM ATTACHED TO THE BENZENE NUCLEUS WITH ACETYLENE WHEREIN THE ACETYLEN IS PRESENT IN AN AMOUNT BETWEEN 15% AND 45% OF THE STOICHIOMETRIC QUANTITY REQUIRED TO REACT WITH SAID ARYL COMPOUND AND IN THE PRESENCE OF HYDROGEN CHLORIDE AND AN ALUMINUM CHLORIDE CATALYST.
Claim 2
Dependent Claim
70 words
A PROCESS FOR PREPARING A NUCLEAR HALOGENATED SUBSTITUTED 1,1-DIARYLETHANE WHICH COMPRISES REACTING A NUCLEAR HALOGENATED SUBSTITUTED ARYL COMPOUND OF THE BENZENE SERIES HAVING AT LEAST ONE HYDROGEN ATOM ATTACHED TO THE BENZENE NUCLEUS WITH ACETYLENE WHEREIN THE ACETYLEN IS PRESENT IN AN AMOUNT BETWEEN 15% AND 45% OF THE STOICHIOMETRIC QUANTITY REQUIRED TO REACT WITH SAID ARYL COMPOUND AND IN THE PRESENCE OF HYDROGEN CHLORIDE AND AN ALUMINUM CHLORIDE CATALYST.
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) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |