US3285866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making polyurethane foams using trimethylamine as a catalyst and blowingagent
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1964-02-07
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Granted: 1966-11-15
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Expires: 1984-02-07
Abstract
No abstract record available.
Inventors
- 👤 George T Gmitter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:03
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/28; C08G18/40; C08G18/62; C08G18/6212; C08J9/143; C08G2110/00; C08G2110/0016; C08G2110/0025; C08G2110/0041; C08G2110/005; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A METHOD OF PREPARING A POLYURETHANE FOAM COMPRISING: (I) REACTING (A) AN ORGANIC POLYISOCYANATE WITH (B) A POLYHYDRIC ORGANIC COMPOUND, (II) IN THE PRESENCE OF A CATALYST AND BLOWNG AGENT CONSISTING OF: (I) TYRIMETHYLAMINE, OR (II) MIXTURES OF TRIMETHYLAMINE AND A HALOGENATED ALKANE WHEREIN TRIMETHYLAMINE IS PRESENT IN AN AMOUNT EQUAL TO AT LEAST 70% OF THE MIXTURE WHEREIN, (I) AND (II) ARE PRESENT IN AN AMOUNT EQUAL TO FROM 2 TO 15% BY WEIGHT OF (A) AND (B); AND WHEREIN SAID ORGANIC POLYISOCYANATE IS PRESENT IN AMOUNTS SUCH THAT THERE IS ONE EQUIVALENT WEIGHT OF SAID POLYHYDRIC ORGANIC COMPOUND FOR FROM ABOUT 0.8 TO 6 EQUIVALENT WEIGHTS OF SAID ORGANIC POLYISOCYANATE.
Claim 2
Independent Claim
112 words
A METHOD OF PREPARING A POLYURETHANE FOAM COMPRISING: (I) REACTING (A) AN ORGANIC POLYISOCYANATE WITH (B) A POLYHYDRIC ORGANIC COMPOUND, (II) IN THE PRESENCE OF A CATALYST AND BLOWNG AGENT CONSISTING OF: (I) TYRIMETHYLAMINE, OR (II) MIXTURES OF TRIMETHYLAMINE AND A HALOGENATED ALKANE WHEREIN TRIMETHYLAMINE IS PRESENT IN AN AMOUNT EQUAL TO AT LEAST 70% OF THE MIXTURE WHEREIN, (I) AND (II) ARE PRESENT IN AN AMOUNT EQUAL TO FROM 2 TO 15% BY WEIGHT OF (A) AND (B); AND WHEREIN SAID ORGANIC POLYISOCYANATE IS PRESENT IN AMOUNTS SUCH THAT THERE IS ONE EQUIVALENT WEIGHT OF SAID POLYHYDRIC ORGANIC COMPOUND FOR FROM ABOUT 0.8 TO 6 EQUIVALENT WEIGHTS OF SAID ORGANIC POLYISOCYANATE.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |