US2520670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyglycerols
Assignee: General Mills Inc
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Filing: 1946-10-24
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Granted: 1950-08-29
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Expires: 1966-10-24
Abstract
No abstract record available.
Inventors
- 👤 Wittcoff Harold
- 👤 Roach John Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:45
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/13; C07C43/135
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
PROCESS FOR THE PRODUCTION OF A POLYGLYCEROL WHICH COMPRISES REACTING GLYCEROL WITH GLYCEROLMONOHALOHYDRIN IN THE PRESENCE OF CONCENTRATED AQUEOUS ALKALI AT AN ELEVATED TEMPERATURE, THEREAFTER DILUTING THE REACTION MIXTURE WITH A LOW ALIPHATIC ALCOHOL, FILTERING TO REMOVE PRECIPITATED INORGANIC MATERIAL, NEUTRALIZING THE FILTRATE, CONCENTRATING THE FILTRATE TO A SYRUP AND EXTRACTING THE SYRUP WITH AN ANHYDROUS LOW ALIPHATIC ALCOHOL TO RECOVER THE POLYGLYCEROL.
Claim 2
Dependent Claim
63 words
PROCESS FOR THE PRODUCTION OF A POLYGLYCEROL WHICH COMPRISES REACTING GLYCEROL WITH GLYCEROLMONOHALOHYDRIN IN THE PRESENCE OF CONCENTRATED AQUEOUS ALKALI AT AN ELEVATED TEMPERATURE, THEREAFTER DILUTING THE REACTION MIXTURE WITH A LOW ALIPHATIC ALCOHOL, FILTERING TO REMOVE PRECIPITATED INORGANIC MATERIAL, NEUTRALIZING THE FILTRATE, CONCENTRATING THE FILTRATE TO A SYRUP AND EXTRACTING THE SYRUP WITH AN ANHYDROUS LOW ALIPHATIC ALCOHOL TO RECOVER THE POLYGLYCEROL.
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) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |