US2590911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partial esters
Assignee: General Mills Inc
•
Filing: 1948-10-21
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Granted: 1952-04-01
•
Expires: 1968-10-21
Abstract
No abstract record available.
Inventors
- 👤 Wittcoff Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:36
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/123; C08G63/137; C07; C07D; C07D309/00; C07D309/02; C07D309/08; C07D309/10; C08G63/46; C11; C11C; C11C3/00; C11C3/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
AN ESTER COMPRISING A POLYHYDROXY CONDENSATION PRODUCT HAVING AT LEAST FOUR HYDROXYL GROUPS, SAID POLYHYDROXY CONDENSATION PRODUCT RESULTING FROM THE CONDENSATION OF FORMALDEHYDE AND A KETONE HAVING AT LEAST FOUR REPLACEABLE HYDROGEN ATOMS ADJACENT THE CARBONYL GROUP, IN WHICH THE MOLAL RATIO OF FORMALDEHYDE TO KETONE IS NOT SUBSTANTIALLY LESS THAN ONE MOLE OF FORMALDEHYDE PER MOLE OF ACTIVE HYDROGEN IN THE KETONE, SAID POLYHYDROXY CONDENSATION PRODUCT HAVING AT LEAST ONE FREE HYDROXYL GROUP AND AT LEAST ONE HYDROXYL GROUP ESTERFIED WITH A HIGHER FATTY ACID.
Claim 2
Dependent Claim
86 words
AN ESTER COMPRISING A POLYHYDROXY CONDENSATION PRODUCT HAVING AT LEAST FOUR HYDROXYL GROUPS, SAID POLYHYDROXY CONDENSATION PRODUCT RESULTING FROM THE CONDENSATION OF FORMALDEHYDE AND A KETONE HAVING AT LEAST FOUR REPLACEABLE HYDROGEN ATOMS ADJACENT THE CARBONYL GROUP, IN WHICH THE MOLAL RATIO OF FORMALDEHYDE TO KETONE IS NOT SUBSTANTIALLY LESS THAN ONE MOLE OF FORMALDEHYDE PER MOLE OF ACTIVE HYDROGEN IN THE KETONE, SAID POLYHYDROXY CONDENSATION PRODUCT HAVING AT LEAST ONE FREE HYDROXYL GROUP AND AT LEAST ONE HYDROXYL GROUP ESTERFIED WITH A HIGHER FATTY ACID.
References Cited (Backward Citations)
GB419604A
Cited
US2303370A
Cited
US2462031A
Cited
US2470964A
Cited
US2480347A
Cited
US2495305A
Cited
US2480348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |