US2892845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective etherification of the 7-hydroxyl group in polyhydroxy flavonoids
Assignee: Individual
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Filing: 1957-11-26
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Granted: 1959-06-30
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Expires: 1977-11-26
Abstract
No abstract record available.
Inventors
- 👤 Jurd Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:16
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/70; A23B2/725; A23B2/729; A23B2/771; C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/22; C07D311/26; C07D311/28; C07D311/30; C11; C11B; C11B5/00; C11B5/0021; C11B5/0035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS COMPRISING REACTING A FLAVONOID SELECTED FROM THE GROUP CONSISTING OF COMPLETELY-ACYLATED, POLYACYLOXY FLAVONES, FLAVONOLS, FLAVANONES, FLAVANOLS, AND ISOFLAVANONES, WHEREIN ONE OF THE ACYLOXY GROUPS IS ON THE 7 POSITION OF THE NUCLEUS AND WHEREIN THE ACYL GROUPS ARE SELECTED FROM THE CLASS CONSISTING OF FORMYL, ACETYL, PROPIONYL, BUTYRYL, BENZOYL, AND TOTUENESULPHONYL, WITH AN ETHERIFYING AGENT OF THE CLASS CONSISTING OF THE CHLORIDES, BROMIDES, IODIDES, AND SULFATES OF ALKYL (C1 TO C12), 2ETHOXYETHYL, 2-PHENOXYETHYL, 2-BENZOXYETHYL, BENZYL, METHYLBENZYL, ISOPROPYLBENZYL, ETHODYBENZYL, AND PHENOXYBENZYL, AT A TEMPERATURE UP TO 60* C., SELECTIVELY TO REPLACE THE ACYL GROUP AT POSITION 7 WITH A RADICAL OF THE CLASS CONSISTING OF ALKYL (C1 TO C12), 2-ETHOXYETHYL, 2PHENOXYETHYL, 2-BENZOXYETHYL, BENZYL, METHYLBENZYL, ISOPROPYLBENZYL, ETHOXYBENZYL, AND PHENOXYBENZYL.
Claim 2
Dependent Claim
119 words
A PROCESS COMPRISING REACTING A FLAVONOID SELECTED FROM THE GROUP CONSISTING OF COMPLETELY-ACYLATED, POLYACYLOXY FLAVONES, FLAVONOLS, FLAVANONES, FLAVANOLS, AND ISOFLAVANONES, WHEREIN ONE OF THE ACYLOXY GROUPS IS ON THE 7 POSITION OF THE NUCLEUS AND WHEREIN THE ACYL GROUPS ARE SELECTED FROM THE CLASS CONSISTING OF FORMYL, ACETYL, PROPIONYL, BUTYRYL, BENZOYL, AND TOTUENESULPHONYL, WITH AN ETHERIFYING AGENT OF THE CLASS CONSISTING OF THE CHLORIDES, BROMIDES, IODIDES, AND SULFATES OF ALKYL (C1 TO C12), 2ETHOXYETHYL, 2-PHENOXYETHYL, 2-BENZOXYETHYL, BENZYL, METHYLBENZYL, ISOPROPYLBENZYL, ETHODYBENZYL, AND PHENOXYBENZYL, AT A TEMPERATURE UP TO 60* C., SELECTIVELY TO REPLACE THE ACYL GROUP AT POSITION 7 WITH A RADICAL OF THE CLASS CONSISTING OF ALKYL (C1 TO C12), 2-ETHOXYETHYL, 2PHENOXYETHYL, 2-BENZOXYETHYL, BENZYL, METHYLBENZYL, ISOPROPYLBENZYL, ETHOXYBENZYL, AND PHENOXYBENZYL.
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) | 1962-06-29 | 1962-12-29 | 1963-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-29 | 1966-12-29 | 1967-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-29 | 1970-12-29 | 1971-06-30 | $7700.00 | Window Closed / Lapsed |