Patent US2566564A successfully refreshed from Google Patents.
US2566564A
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Process for the manufacture of isophorone and homo-isophorones
Assignee: Distillers Co Yeast Ltd
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Filing: 1947-09-06
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Granted: 1951-09-04
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Expires: 1967-09-06
Abstract
No abstract record available.
Inventors
- 👤 Highet Hugh Campbell
- 👤 Salt Francis Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:38
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/72; C07C45/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN THE PROCESS FOR THE PRODUCTION OF ISOPHORONE AND HOMO-ISOPHORONES BY THE CONDENSATION OF A SATURATED KETONE CONTAINING 3 TO 5 CARBON ATOMS IN THE MOLECULE THE IMPROVEMENT WHICH COMPRISES BRINGING A SUBSTANCE CONSISTING ESSENTIALLY OF SAID KETONE INTO INITIMATE CONTACT WITH AN AQUEOUS ALKALI METAL HYDROXIDE SOLUTION, IN A CONCENTRATION FROM 0.2 TO 10% BY WEIGHT WITH RESPECT TO THE HYDROXIDE THEREIN AT TEMPERATURES BETWEEN 175* C. AND THE CRITICAL TEMPERATURE OF THE KETONE WHILST MAINTAINING SUFFICIENT PRESSURE IN THE REACTION ZONE TO MAINTAIN THE CONTENTS THEREIN SUBSTANTIALLY IN THE LIQUID PHASE.
Claim 2
Dependent Claim
93 words
IN THE PROCESS FOR THE PRODUCTION OF ISOPHORONE AND HOMO-ISOPHORONES BY THE CONDENSATION OF A SATURATED KETONE CONTAINING 3 TO 5 CARBON ATOMS IN THE MOLECULE THE IMPROVEMENT WHICH COMPRISES BRINGING A SUBSTANCE CONSISTING ESSENTIALLY OF SAID KETONE INTO INITIMATE CONTACT WITH AN AQUEOUS ALKALI METAL HYDROXIDE SOLUTION, IN A CONCENTRATION FROM 0.2 TO 10% BY WEIGHT WITH RESPECT TO THE HYDROXIDE THEREIN AT TEMPERATURES BETWEEN 175* C. AND THE CRITICAL TEMPERATURE OF THE KETONE WHILST MAINTAINING SUFFICIENT PRESSURE IN THE REACTION ZONE TO MAINTAIN THE CONTENTS THEREIN SUBSTANTIALLY IN THE LIQUID PHASE.
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) | 1954-09-03 | 1955-03-05 | 1955-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-03 | 1959-03-05 | 1959-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-03 | 1963-03-05 | 1963-09-04 | $7700.00 | Window Closed / Lapsed |