Patent US2598468A successfully refreshed from Google Patents.
US2598468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for production of cholesterol
Assignee: BOTANY MILLS Inc
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Filing: 1950-02-03
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Granted: 1952-05-27
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Expires: 1970-02-03
Abstract
No abstract record available.
Inventors
- 👤 Vaterrodt Peter
- 👤 Mcnellis James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:00
CPC Classifications
C; C07; C07J; C07J9/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A METHOD FOR PRODUCING CHOLESTEROL FROM LANOLIN ALCOHOLS, WHICH COMPRISES DISSOLVING LANOLIN ALCOHOLS IN A SOLVENT CONSISTING OF A MIXTURE OF A KETONE AND AN ALCOHOL AT A TEMPERATURE ABOUT 134* F., LOWERING THE TEMPERATURE TO THE DEGREE AT WHICH LANOSTEROL IS PRECIPITATED OUT OF THE SOLUTION, AND SEPARATING THE SAME, REMOVING THE SOLVENT FROM THE SOLUTION OF CHOLESTEROL AND ALIPHATIC ALCOHOL WHICH REMAIN AFTER REMOVAL OF THE LANOSTEROL, EMPLOYING A SECOND SOLVENT CONSISTING OF ETHYLENE DICHLORIDE OR ITS EQUIVALENT TO TAKE UP THE CHOLESTEROL AND ALIPHATIC ALCOHOLS, ADDING A MIXTURE OF MALEIC AND OXALIC ACIDS TO FORM AN ADDITION PRODUCT WITH THE CHOLESTEROL ADDITION PRODUCT, DISSOLV180* F., LOWERING THE TEMPERATURE AND CRYSTALLIZING OUT THE CHOLESTEROL ADDITION PRODUCT, DISSOLVING THE ADDITION PRODUCT IN A SOLVENT SELECTED FROM THE GROUP OF ALCOHOLS AND KETONES AND MIXTURE THEREOF, AT AN ELEVATED TEMPERATURE, AND COOLING THE LAST-NAMED SOLUTION UNTIL PRECIPITATION OF THE CHOLESTEROL.
Claim 2
Independent Claim
150 words
A METHOD FOR PRODUCING CHOLESTEROL FROM LANOLIN ALCOHOLS, WHICH COMPRISES DISSOLVING LANOLIN ALCOHOLS IN A SOLVENT CONSISTING OF A MIXTURE OF A KETONE AND AN ALCOHOL AT A TEMPERATURE ABOUT 134* F., LOWERING THE TEMPERATURE TO THE DEGREE AT WHICH LANOSTEROL IS PRECIPITATED OUT OF THE SOLUTION, AND SEPARATING THE SAME, REMOVING THE SOLVENT FROM THE SOLUTION OF CHOLESTEROL AND ALIPHATIC ALCOHOL WHICH REMAIN AFTER REMOVAL OF THE LANOSTEROL, EMPLOYING A SECOND SOLVENT CONSISTING OF ETHYLENE DICHLORIDE OR ITS EQUIVALENT TO TAKE UP THE CHOLESTEROL AND ALIPHATIC ALCOHOLS, ADDING A MIXTURE OF MALEIC AND OXALIC ACIDS TO FORM AN ADDITION PRODUCT WITH THE CHOLESTEROL ADDITION PRODUCT, DISSOLV180* F., LOWERING THE TEMPERATURE AND CRYSTALLIZING OUT THE CHOLESTEROL ADDITION PRODUCT, DISSOLVING THE ADDITION PRODUCT IN A SOLVENT SELECTED FROM THE GROUP OF ALCOHOLS AND KETONES AND MIXTURE THEREOF, AT AN ELEVATED TEMPERATURE, AND COOLING THE LAST-NAMED SOLUTION UNTIL PRECIPITATION OF THE CHOLESTEROL.
References Cited (Backward Citations)
US2302679A
Cited
US2362605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |