US2990376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linking agent and method for making same
Assignee: Dow Chemical Co
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Filing: 1959-01-29
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Granted: 1961-06-27
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Expires: 1979-01-29
Abstract
No abstract record available.
Inventors
- 👤 Wilbur L Bressler
- 👤 Calvin F Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:04
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04; C07H15/06; C07H15/08; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3203; C08G18/3206; C08G18/3218; C08G18/40; C08G18/48; C08G18/4804; C08G18/4816; C08G18/487; C08G18/4883; C08G2110/00; C08G2110/0025; C08G2110/0041; C08G2110/005; C08G2110/0058
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A COMPOSITION COMPRISING THE POLYOL PRODUCT FORMED BY THE REACTION OF (1) A MIXTURE OF ONE MOLE OF SUCROSE, ABOUT 2-3 MOLES OF GLYCEROL AND ABOUT 0-1 MOLE OF WATER WITH (2) ONE MOLE OF PROPYLENE OXIDE PER HYDROXYL EQUIVALENT IS SAID SUROSE, GLYCEROL AND WATER, SAID REACTION BEING CONDUCTED IN THE PRESENCE OF A CATALYTIC AMOUNT OF TERTIARY AMINE FREE OF LABILE HYDROGEN, AT A TEMPERATURE OF ABOUT 80 TO 140* C. AMD UNDER A PRESSURE AT LEAST EQUAL TO THE AUTOGENOUS PRESSURE.
Claim 2
Dependent Claim
84 words
A COMPOSITION COMPRISING THE POLYOL PRODUCT FORMED BY THE REACTION OF (1) A MIXTURE OF ONE MOLE OF SUCROSE, ABOUT 2-3 MOLES OF GLYCEROL AND ABOUT 0-1 MOLE OF WATER WITH (2) ONE MOLE OF PROPYLENE OXIDE PER HYDROXYL EQUIVALENT IS SAID SUROSE, GLYCEROL AND WATER, SAID REACTION BEING CONDUCTED IN THE PRESENCE OF A CATALYTIC AMOUNT OF TERTIARY AMINE FREE OF LABILE HYDROGEN, AT A TEMPERATURE OF ABOUT 80 TO 140* C. AMD UNDER A PRESSURE AT LEAST EQUAL TO THE AUTOGENOUS PRESSURE.
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) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |