US2845402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble polyesters curable to insoluble polymers
Assignee: General Electric Co
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Filing: 1953-12-28
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Granted: 1958-07-29
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Expires: 1973-12-28
Abstract
No abstract record available.
Inventors
- 👤 Howard C Woodruff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:23
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/676
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS OF PREPARING WATER-SOLUBLE POLYMERIZABLE POLYESTERS WHICH COMPRISES ESTERIFYING IN ONE STEP AT AN ELEVATED TEMPERATURE TO A WATER-SOLUBLE ACIDIC POLYESTER (1) ONE MOL OF AN UNSATURATED ALIPHATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID, MALEIC ANHYDRIDE, FUMARIC ACID, AND MIXTURES THEREOF, (2) ABOUT 0.4 TO 2.0 MOLS OF DICARBOXYLIC ACID FREE OF CHAIN UNSATURATION, AND (3) FOR EACH MOL OF COMBINED UNSATURATED AND SATURATED ACID, ABOUT 0.8 TO 1.8 MOLS OF THE PRODUCT OF REACTION OF ONE MOL OF A POLYHYDRIC ALCOHOL CONTAINING MORE THAN TWO HYDROXYL GROUPS AND ABOUT 3 TO 30 MOLS OF ETHYLENE OXIDE, SAID REACTION PRODUCT HAVING AT LEAST ONE ETHER OXYGEN SEPARATED FROM A HYDROXYL GROUP BY THE -CH2-CH2- RADICAL.
Claim 2
Dependent Claim
119 words
A PROCESS OF PREPARING WATER-SOLUBLE POLYMERIZABLE POLYESTERS WHICH COMPRISES ESTERIFYING IN ONE STEP AT AN ELEVATED TEMPERATURE TO A WATER-SOLUBLE ACIDIC POLYESTER (1) ONE MOL OF AN UNSATURATED ALIPHATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID, MALEIC ANHYDRIDE, FUMARIC ACID, AND MIXTURES THEREOF, (2) ABOUT 0.4 TO 2.0 MOLS OF DICARBOXYLIC ACID FREE OF CHAIN UNSATURATION, AND (3) FOR EACH MOL OF COMBINED UNSATURATED AND SATURATED ACID, ABOUT 0.8 TO 1.8 MOLS OF THE PRODUCT OF REACTION OF ONE MOL OF A POLYHYDRIC ALCOHOL CONTAINING MORE THAN TWO HYDROXYL GROUPS AND ABOUT 3 TO 30 MOLS OF ETHYLENE OXIDE, SAID REACTION PRODUCT HAVING AT LEAST ONE ETHER OXYGEN SEPARATED FROM A HYDROXYL GROUP BY THE -CH2-CH2- RADICAL.
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) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |