US2932621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polyurethane foam utilizing a salt of dimethylethanol amine and a dicarboxylic acid as a catalyst
Assignee: PPG Industries Inc
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Filing: 1956-02-07
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Granted: 1960-04-12
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Expires: 1976-02-07
Abstract
No abstract record available.
Inventors
- 👤 Samuel M Terry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:11
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4244; C08G18/4247; C08G18/425; C08G18/08; C08G18/16; C08G18/18; C08G18/1875; C08G18/4205; C08G18/4208
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN A METHOD OF FORMING A FOAMED, POLYURETHANE RESIN, THE STEPS OF FORMING A LIQUID MIXTURE OF (A) 100 PARTS BY WEIGHT OF A POLYESTER OF A DICARBOXYLIC ACID, A GLYCOL AND GLYCEROL, SAID POLYESTER BEING A HYDROXYL VALUE IN A RANGE OF ABOUT 40 TO ABOUT 600, (B) ABOUT 20 TO 100 PARTS BY WEIGHT OF TOLYLENE DIISOCYANATE, ABOUT 0.1 TO 5 PARTS BY WEIGHT OF WATER, ABOUT 0.2 TO 5 PARTS BY WEIGHT OF POLYESTER OF A DELAYED ACTION CATALYST WHICH CONSISTS ESSENTIALLY OF A SALT OF OXALIC ACID AND DIMETHYLETHANOL AMINE THE SALT BEING OF A PH VALUE IN A RANGE OF ABOUT 8 TO ABOUT 11 ALLOWING THE MIXTURE TO FOAM AND THEN CURING THE FOAM AT A TEMPERATURE OF ABOUT 220*F.
Claim 2
Dependent Claim
126 words
IN A METHOD OF FORMING A FOAMED, POLYURETHANE RESIN, THE STEPS OF FORMING A LIQUID MIXTURE OF (A) 100 PARTS BY WEIGHT OF A POLYESTER OF A DICARBOXYLIC ACID, A GLYCOL AND GLYCEROL, SAID POLYESTER BEING A HYDROXYL VALUE IN A RANGE OF ABOUT 40 TO ABOUT 600, (B) ABOUT 20 TO 100 PARTS BY WEIGHT OF TOLYLENE DIISOCYANATE, ABOUT 0.1 TO 5 PARTS BY WEIGHT OF WATER, ABOUT 0.2 TO 5 PARTS BY WEIGHT OF POLYESTER OF A DELAYED ACTION CATALYST WHICH CONSISTS ESSENTIALLY OF A SALT OF OXALIC ACID AND DIMETHYLETHANOL AMINE THE SALT BEING OF A PH VALUE IN A RANGE OF ABOUT 8 TO ABOUT 11 ALLOWING THE MIXTURE TO FOAM AND THEN CURING THE FOAM AT A TEMPERATURE OF ABOUT 220*F.
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) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |