US2544308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining of organic compounds
Assignee: Cities Service Oil Co
•
Filing: 1946-07-03
•
Granted: 1951-03-06
•
Expires: 1966-07-03
Abstract
No abstract record available.
Inventors
- 👤 Louis D Friedman
- 👤 William B Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:23
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/14875; C07C29/00; C07C29/74; C07C29/88; C07C67/00; C07C67/48; C07C67/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
THE PROCESS OF REMOVING CARBONYL IMPURITIES OF THE GROUP CONSISTING OF ALDEHYDES AND KETONES FROM ORGANIC COMPOSITIONS WHICH ARE NOT ESSENTIALLY REACTIVE WITH BASIC CONDENSING AGENTS, WHICH COMPRISES TREATING ANB ORGANIC COMPOSITION CONTAINING CARBONYL IMPURITIES IN PROPORTIONS OUTSIDE THE RANGE OF FROM ABOUT 1 MOL TO ABOUT 9 MOLS OF ALDEHYDE TO 1 MOL OF KETONE, WITH AN ADDED CARBONYL COMPOUND OF SUCH A NATURE AS TO BALANCE THE PROPORTION OF ALDEHYDE TO KETONE WITHIN THE SAID RANGE, CONDENSING THE CARBONYLS IN THE PRESENCE OF A BASIC CONDENSING AGENT INTO AN ALDEHYDE-KETONE CONDENSATION PRODUCT WHICH IS LESS VOLATILE THAN THE PRINCIPAL COMPOUND, AND SEPARATING THE PRINCIPAL COMPOUND FROM SUCH CONDENSATION PRODUCT.
Claim 2
Dependent Claim
111 words
THE PROCESS OF REMOVING CARBONYL IMPURITIES OF THE GROUP CONSISTING OF ALDEHYDES AND KETONES FROM ORGANIC COMPOSITIONS WHICH ARE NOT ESSENTIALLY REACTIVE WITH BASIC CONDENSING AGENTS, WHICH COMPRISES TREATING ANB ORGANIC COMPOSITION CONTAINING CARBONYL IMPURITIES IN PROPORTIONS OUTSIDE THE RANGE OF FROM ABOUT 1 MOL TO ABOUT 9 MOLS OF ALDEHYDE TO 1 MOL OF KETONE, WITH AN ADDED CARBONYL COMPOUND OF SUCH A NATURE AS TO BALANCE THE PROPORTION OF ALDEHYDE TO KETONE WITHIN THE SAID RANGE, CONDENSING THE CARBONYLS IN THE PRESENCE OF A BASIC CONDENSING AGENT INTO AN ALDEHYDE-KETONE CONDENSATION PRODUCT WHICH IS LESS VOLATILE THAN THE PRINCIPAL COMPOUND, AND SEPARATING THE PRINCIPAL COMPOUND FROM SUCH CONDENSATION PRODUCT.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |