Patent US2773904A successfully refreshed from Google Patents.
US2773904A
Expired / Lapsed
US
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Preparation of aralkyl ketones
Assignee: Purex Corp Ltd
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Filing: 1952-09-29
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Granted: 1956-12-11
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Expires: 1972-09-29
Abstract
No abstract record available.
Inventors
- 👤 Robert M Silverstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:06
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/45; C07C45/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
THE METHOD OF PRODUCING ARALKYL KETONES, THAT INCLUDES CONDENSING A FATTY GLYCERIDE DIRECTLY WITH AN AROMATIC HYDROCARBON COMPOUND IN THE PRESENCE OF A FRIEDEL AND CRAFTS TYPE CATALYST TO FORM THE ARALKYL KETONE, AND SEPARATING THE KETONE AS A MATERIAL CONSISTING ESSENTIALLY OF THE KETONE FROM THE REACTION PRODUCT MIXTURE, SAID AROMATIC COMPOUND BEING OF THE GROUP CONSISTING OF BENZENE, TOLUENE, XYLENE, AND NAPHTHALENE.
Claim 2
Independent Claim
64 words
THE METHOD OF PRODUCING ARALKYL KETONES, THAT INCLUDES CONDENSING A FATTY GLYCERIDE DIRECTLY WITH AN AROMATIC HYDROCARBON COMPOUND IN THE PRESENCE OF A FRIEDEL AND CRAFTS TYPE CATALYST TO FORM THE ARALKYL KETONE, AND SEPARATING THE KETONE AS A MATERIAL CONSISTING ESSENTIALLY OF THE KETONE FROM THE REACTION PRODUCT MIXTURE, SAID AROMATIC COMPOUND BEING OF THE GROUP CONSISTING OF BENZENE, TOLUENE, XYLENE, AND NAPHTHALENE.
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) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |