US3956375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,3-Diphenyl-propanone-1-derivatives and the salts thereof
Assignee: Chinoin Private Co Ltd
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Filing: 1972-12-04
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Granted: 1976-05-11
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Expires: 1992-12-04
Abstract
Abstract A sweetening agent in the form of a 1,3-diphenyl-propanone-1 derivative of the formula ##SPC1## Wherein R is hydrogen, hydroxyl, alkoxy or carboxyl-substituted, sulphonyl-substituted, phosphonyl-substituted, dialkylamino-substituted, trialkyl ammonium-substituted alkoxy; R 1 is hydrogen or a hydrophylic group but both R and R 1 are not both hydrogen; R 2 and R 3 are hydroxyl or alkoxy.
Inventors
- 👤 Lorant Farkas
- 👤 Mihaly Nogradi
- 👤 Agnes Gottsegen
- 👤 Sandor Antus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:52
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/40; C07C59/76; C07C59/90; C07C309/00; C07C45/00; C07C45/61; C07C45/62; C07C49/00; C07C49/76; C07C49/84
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
29 words
A compound of the formula: ##SPC6## wherein R is methoxy substituted by carboxy, R 1 is hydrogen, and R 2 and R 2 stand for hydroxy and alkoxy, respectively.
Claim 2
Dependent Claim
29 words
A compound of the formula: ##SPC6## wherein R is methoxy substituted by carboxy, R 1 is hydrogen, and R 2 and R 2 stand for hydroxy and alkoxy, respectively.
Claim 3
Dependent Claim
13 words
1-(2-hydroxy-4-carboxy-methoxy-phenyl)-3-(3-hydroxy-4-alkoxy-phenyl)-propanone-1 and alkali metal salts thereof, the alkoxy being methoxy, ethoxy or propoxy.
Claim 4
Dependent Claim
13 words
1-(2-hydroxy-4-carboxy-methoxy-phenyl)-3-(3-hydroxy-4-alkoxy-phenyl)-propanone-1 and alkali metal salts thereof, the alkoxy being methoxy, ethoxy or propoxy.
Claim 5
Dependent Claim
6 words
1-(2-hydroxy-4-carboxy-methoxy-phenyl)-3-(3-hydroxy-4-methoxy-phenyl)-propanone-1 and alkali metal salt thereof.
Claim 6
Dependent Claim
6 words
1-(2-hydroxy-4-carboxy-methoxy-phenyl)-3-(3-hydroxy-4-methoxy-phenyl)-propanone-1 and alkali metal salt thereof.
Claim 7
Dependent Claim
6 words
1-(2-hydroxy-4-carboxy-methoxy-phenyl)-3-(3-hydroxy-4-ethoxy-phenyl)-propanone-1 and alkali metal salt thereof.
Claim 8
Dependent Claim
6 words
1-(2-hydroxy-4-carboxy-methoxy-phenyl)-3-(3-hydroxy-4-ethoxy-phenyl)-propanone-1 and alkali metal salt thereof.
Claim 9
Dependent Claim
6 words
1-(2-hydroxy-4-carboxy-methoxy-phenyl)-3-(3-hydroxy-4-propyloxy-phenyl)-propanone-1 and alkali metal salt thereof.
Claim 10
Dependent Claim
6 words
1-(2-hydroxy-4-carboxy-methoxy-phenyl)-3-(3-hydroxy-4-propyloxy-phenyl)-propanone-1 and alkali metal salt thereof.
Claim 11
Dependent Claim
6 words
1-(2-hydroxy-5-carboxy-methoxy-phenyl)-3-(3-hydroxy-4-methoxy-phenyl)-propanone and alkali metal salts thereof.
Claim 12
Dependent Claim
6 words
1-(2-hydroxy-5-carboxy-methoxy-phenyl)-3-(3-hydroxy-4-methoxy-phenyl)-propanone and alkali metal salts thereof.
References Cited (Backward Citations)
US3087821A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |