US3021324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of sugar esters
Assignee: Drew Chemical Corp
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Filing: 1958-01-28
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Granted: 1962-02-13
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Expires: 1978-01-28
Abstract
No abstract record available.
Inventors
- 👤 Knafo Guy
- 👤 Fuhrmann Robert
- 👤 Torben E Neesby
- 👤 Vigen K Babayan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:02
CPC Classifications
C; C07; C07H; C07H13/00; C07H13/02; C07H13/04; C07H13/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD OF MAKING PARTIAL ESTERS OF SUGAR POLYOLS HAVING AT LEAST SIX HYDROXYL GROUPS WHICH COMPRISES DISSOLVING SAID SUGAR POLYOL IN AN AMOUNT OF WATER NOT MORE THAN THE POLYOL, ADDING THERETO AN AMOUNT OF AN ALKALI TAKEN FROM THE CLASS CONSISTING OF ALKALI METAL HYDROXIDES, CARBONATES AND BICARBONATES TO PROVIDE A PH OF ABOUT 8 TO 11, INTRODUCING THE CHLORIDE OF A HIGHER FATTY ACID HAVING 8 TO 22 CARBON ATOMS IN AMOUNT LESS THAN THAT NECESSARY TO COMPLETELY ESTERIFY SAID POLYOL, THE TEMPERATURE OF THE REACTION IS NOT OVER ABOUT 40* TO 50* C., WHEREBY A REACTION TAKES PLACE FORMING PARTIAL ESTERS OF SAID SUGAR POLYOLS.
Claim 2
Independent Claim
109 words
A METHOD OF MAKING PARTIAL ESTERS OF SUGAR POLYOLS HAVING AT LEAST SIX HYDROXYL GROUPS WHICH COMPRISES DISSOLVING SAID SUGAR POLYOL IN AN AMOUNT OF WATER NOT MORE THAN THE POLYOL, ADDING THERETO AN AMOUNT OF AN ALKALI TAKEN FROM THE CLASS CONSISTING OF ALKALI METAL HYDROXIDES, CARBONATES AND BICARBONATES TO PROVIDE A PH OF ABOUT 8 TO 11, INTRODUCING THE CHLORIDE OF A HIGHER FATTY ACID HAVING 8 TO 22 CARBON ATOMS IN AMOUNT LESS THAN THAT NECESSARY TO COMPLETELY ESTERIFY SAID POLYOL, THE TEMPERATURE OF THE REACTION IS NOT OVER ABOUT 40* TO 50* C., WHEREBY A REACTION TAKES PLACE FORMING PARTIAL ESTERS OF SAID SUGAR POLYOLS.
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) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |