Patent US3225028A successfully refreshed from Google Patents.
US3225028A
Expired / Lapsed
US
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Acrolein adducts of polygalactomannans and polyglucomannans and process of preparing same
Assignee: Individual
•
Filing: 1962-06-11
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Granted: 1965-12-21
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Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Nordgren Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:15
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/006; C08B37/0087; C08B37/0093; C08B37/0096; D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/31; D21H17/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS OF PREPARING AN ADDUCT OF ACROLEIN AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYGALACTOMANNANS, POLYGLUYCOMANNANS AND MIXTURES THEREOF WHICH COMPRISES REACTING THE MATERIAL WITH ABOUT 0.25 TO 1.0 EQUIVALENT OF ACROLEIN FOR EACH EQUIVALENT OF ANHYDROUS HEXOSE UNIT IN THE MATERIAL, SAID REACTION BEING CARRIED OUT AT A TEMPERATURE OF ABOUT 25 TO 100*C. AND THE PH OF THE REACTION MIXTURES BEING IN THE RANGE OF ABOUT 4.5 TO 7.5
Claim 2
Dependent Claim
74 words
A PROCESS OF PREPARING AN ADDUCT OF ACROLEIN AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYGALACTOMANNANS, POLYGLUYCOMANNANS AND MIXTURES THEREOF WHICH COMPRISES REACTING THE MATERIAL WITH ABOUT 0.25 TO 1.0 EQUIVALENT OF ACROLEIN FOR EACH EQUIVALENT OF ANHYDROUS HEXOSE UNIT IN THE MATERIAL, SAID REACTION BEING CARRIED OUT AT A TEMPERATURE OF ABOUT 25 TO 100*C. AND THE PH OF THE REACTION MIXTURES BEING IN THE RANGE OF ABOUT 4.5 TO 7.5
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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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |