US2933462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of foamed polyurethanes
Assignee: Aerojet Rocketdyne Inc
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Filing: 1957-07-03
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Granted: 1960-04-19
•
Expires: 1977-07-03
Abstract
No abstract record available.
Inventors
- 👤 Fischer James Rodney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:56
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/225; C08G18/222; C08G18/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
THE METHOD OF PREPARING A FOAMED POLYURETHANE COMPOSITION COMPRISING REACTING AN ORGANIC COMPOUND HAVING, AS ITS SOLE REACTING GROUPS, A PLURALITY OF ISOCYANATE GROUPS WITH AN ORGANIC COMPOUND HAVING, AS ITS SOLE REACTING GROUPS, A PLURALITY OF HYDROXYL GROUPS, AND WATER, IN THE PRESENCE OF A CHELATE HAVING THE GENERAL FORMULA:
Claim 2
Independent Claim
51 words
THE METHOD OF PREPARING A FOAMED POLYURETHANE COMPOSITION COMPRISING REACTING AN ORGANIC COMPOUND HAVING, AS ITS SOLE REACTING GROUPS, A PLURALITY OF ISOCYANATE GROUPS WITH AN ORGANIC COMPOUND HAVING, AS ITS SOLE REACTING GROUPS, A PLURALITY OF HYDROXYL GROUPS, AND WATER, IN THE PRESENCE OF A CHELATE HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |