US3203982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for hydrogenating diarylketone carboxylic acids
Assignee: Gulf Research and Development Co
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Filing: 1960-11-30
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Granted: 1965-08-31
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Expires: 1980-11-30
Abstract
No abstract record available.
Inventors
- 👤 John H Mccracken
- 👤 Johann G D Schulz
- 👤 Arthur C Whitaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:17
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/347; C07C51/367; C07C51/377
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A PROCESS FOR HYDROGENATING A BENZOPHENONE CARBOXYLIC ACID HAVING FROM ONE TO TWO CARBOXYLIC ACID GROUPS ON EACH OF THE RINGS OF SAID BENZOPHENONE CARBOXYLIC ACID, SAID CARBOXYLIC ACID GROUPS BEING SYMMETRICALLY ARRANGED ON SAID RINGS, AT LEAST ONE OF SAID CARBOXYLIC ACID GROUPS ON EACH OF SAID RINGS BEING IN THE 4 POSITION RELATIVE TO THE CARBONYL OF SAID BENZOPHENONE CARBOXYLIC ACID, WHICH COMPRISES HEATING AN AQUEOUS SOLUTION OF A SALT OF SAID ACID WHEREIN SAID SALT IS SELECTED FROM THE GROUP CONSISTING OF THE SODIUM, POTASSIUM, LITHIUM, RUBIDIUM, CESIUM, BERYLLIUM, MAGNESIUM AND AMMONIUM SALTS OF SAID BENZOPHENONE CARBOXYLIC ACID IN THE PRESENCE OF HYDROGEN AND A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF COBALT, NICKEL AND COPPER CHROMITE AT A TEMPERATURE OF ABOUT 100* TO ABOUT 200* C., A PRESSURE OF ABOUT 300 TO ABOUT 1000 POUNDS PER SQUARE INCH GAUGE FOR ABOUT 15 MINUTES TO ABOUT 10 HOURS TO OBTAIN A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE CORRESPONDING SALT OF A DIARYLCARBINOL CARBOXYLIC ACID AND THE CORRESPONDING SALT OF A DIARYLMETHANE CARBOXYLIC ACID.
Claim 2
Dependent Claim
179 words
A PROCESS FOR HYDROGENATING A BENZOPHENONE CARBOXYLIC ACID HAVING FROM ONE TO TWO CARBOXYLIC ACID GROUPS ON EACH OF THE RINGS OF SAID BENZOPHENONE CARBOXYLIC ACID, SAID CARBOXYLIC ACID GROUPS BEING SYMMETRICALLY ARRANGED ON SAID RINGS, AT LEAST ONE OF SAID CARBOXYLIC ACID GROUPS ON EACH OF SAID RINGS BEING IN THE 4 POSITION RELATIVE TO THE CARBONYL OF SAID BENZOPHENONE CARBOXYLIC ACID, WHICH COMPRISES HEATING AN AQUEOUS SOLUTION OF A SALT OF SAID ACID WHEREIN SAID SALT IS SELECTED FROM THE GROUP CONSISTING OF THE SODIUM, POTASSIUM, LITHIUM, RUBIDIUM, CESIUM, BERYLLIUM, MAGNESIUM AND AMMONIUM SALTS OF SAID BENZOPHENONE CARBOXYLIC ACID IN THE PRESENCE OF HYDROGEN AND A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF COBALT, NICKEL AND COPPER CHROMITE AT A TEMPERATURE OF ABOUT 100* TO ABOUT 200* C., A PRESSURE OF ABOUT 300 TO ABOUT 1000 POUNDS PER SQUARE INCH GAUGE FOR ABOUT 15 MINUTES TO ABOUT 10 HOURS TO OBTAIN A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE CORRESPONDING SALT OF A DIARYLCARBINOL CARBOXYLIC ACID AND THE CORRESPONDING SALT OF A DIARYLMETHANE CARBOXYLIC ACID.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |