US3231597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane preparation
Assignee: Aerojet Rocketdyne Inc
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Filing: 1957-07-03
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Granted: 1966-01-25
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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
2026-10-26 12:33
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/222; C08G18/225; C08G18/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
THE METHOD OF PREPARING A NON-CELLULAR POLYURETHANE COMPRISING REACTING AN ORGANIC COMPOUND HAVING, AS IT SOLE REACTING GROUPS, A PLURALITY OF ISOCYANATE GROUPS WITH AN ORGANIC COMPOUND HAVING, AS ITS SOLE REACTING GROUPS, A PLURALITY OF HYDROXYL GROUPS IN THE PRESENCE OF A CHELATE HAVING THE GENERAL FORMULA:
Claim 2
Independent Claim
48 words
THE METHOD OF PREPARING A NON-CELLULAR POLYURETHANE COMPRISING REACTING AN ORGANIC COMPOUND HAVING, AS IT SOLE REACTING GROUPS, A PLURALITY OF ISOCYANATE GROUPS WITH AN ORGANIC COMPOUND HAVING, AS ITS SOLE REACTING GROUPS, A PLURALITY OF HYDROXYL GROUPS IN THE PRESENCE OF A CHELATE HAVING THE GENERAL FORMULA:
Claim 3
Independent Claim
75 words
THE METHOD OF PREPARING A NON-CELLULAR POLYURETHANE 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 IN THE PRESENCE OF BERYLLIUM ACETYLACETONATE IN AN AMOUNT NOT GREATER THAN ABOUT 1 PERCENT BY WEIGHT OF THE TOTAL MASS SAID REACTION BEING CARRIED OUT IN AN ESSENTIALLY NEUTRAL ENVIRONMENT IN THE ESSENTIAL ABSENCE OF WATER.
Claim 4
Independent Claim
75 words
THE METHOD OF PREPARING A NON-CELLULAR POLYURETHANE 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 IN THE PRESENCE OF BERYLLIUM ACETYLACETONATE IN AN AMOUNT NOT GREATER THAN ABOUT 1 PERCENT BY WEIGHT OF THE TOTAL MASS SAID REACTION BEING CARRIED OUT IN AN ESSENTIALLY NEUTRAL ENVIRONMENT IN THE ESSENTIAL ABSENCE OF WATER.
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |