US2950262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of foamed polyurethane using salt of mannich base as catalyst
Assignee: PPG Industries Inc
•
Filing: 1955-08-03
•
Granted: 1960-08-23
•
Expires: 1975-08-03
Abstract
No abstract record available.
Inventors
- 👤 David C Bush
- 👤 Earl E Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:00
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1875
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
THE METHOD OF EFFECTING A REACTION TO FORM A FOAMED POLYURETHANE RESIN OF A MIXTURE COMPRISING 100 PARTS BY WEIGHT OF A POLYESTER OF A DICARBOXYLIC ACID AND A POLYHYDRIC ALCOHOL, ABOUT 20 TO ABOUT 100 PARTS BY WEIGHT OF AN ORGANIC DIISOCYANATE, ABOUT 0.1 TO ABOUT 5 PARTS BY WEIGHT OF WATER AS WATER OF CRYSTALLIZATION IN A COMPOUND WHICH IS SELECTED FROM THE GROUP CONSISTING A MAGNESIUM SULFATE HEPTAHYDRATE, GLAUBER''S SALT, SODIUM SULFATE HEPTAHYDRATE AND SODIUM ACETATE TRIHYDRATE, AND ABOUT 0.2 TO ABOUT 5 PARTS BY WEIGHT OF THE AMMONIUM SALT OF THE FORMULA:
Claim 2
Independent Claim
96 words
THE METHOD OF EFFECTING A REACTION TO FORM A FOAMED POLYURETHANE RESIN OF A MIXTURE COMPRISING 100 PARTS BY WEIGHT OF A POLYESTER OF A DICARBOXYLIC ACID AND A POLYHYDRIC ALCOHOL, ABOUT 20 TO ABOUT 100 PARTS BY WEIGHT OF AN ORGANIC DIISOCYANATE, ABOUT 0.1 TO ABOUT 5 PARTS BY WEIGHT OF WATER AS WATER OF CRYSTALLIZATION IN A COMPOUND WHICH IS SELECTED FROM THE GROUP CONSISTING A MAGNESIUM SULFATE HEPTAHYDRATE, GLAUBER''S SALT, SODIUM SULFATE HEPTAHYDRATE AND SODIUM ACETATE TRIHYDRATE, AND ABOUT 0.2 TO ABOUT 5 PARTS BY WEIGHT OF THE AMMONIUM SALT OF THE FORMULA:
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) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |