US3154522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyisocyanurate preparation using a triethylene diamine and a tertiary imine co-catalyst
Assignee: Air Products and Chemicals Inc
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Filing: 1962-04-20
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Granted: 1964-10-27
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Expires: 1982-04-20
Abstract
No abstract record available.
Inventors
- 👤 Burton D Beitchman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:41
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/02; C08G18/022; Y; Y10; Y10S; Y10S521/00; Y10S521/902; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
THE METHOD OF PREPARING A POLYISOCYANURATE COMPOSITION WHICH CONSISTS OF PREPARING A REACTION MIXTURE CONSISTING ESSENTIALLY OF AROMATIC DIISOCYANATES; ADDING TO SUCH REACTION MIXTURE A CATALYST COMPOSITION PROVIDING 0.1 TO 1 PART OF TREITHYLENEDAMINE PER 100 PARTS OF SAID AROMATIC DIISOCYANATE AND FROM 0.01 TO 2.0 PARTS BY WEIGHT OF A LOWER TERTIARY IMINE PER 100 PARTS OF SAID AROMATIC DIISOCYANATE, SAID TERTIARY IMINE HAVING AT LEAST 3 BUT NOT MORE THAN 9 CARBON ATOMS PER MOLECULE AND OF THE FORMULA
Claim 2
Independent Claim
81 words
THE METHOD OF PREPARING A POLYISOCYANURATE COMPOSITION WHICH CONSISTS OF PREPARING A REACTION MIXTURE CONSISTING ESSENTIALLY OF AROMATIC DIISOCYANATES; ADDING TO SUCH REACTION MIXTURE A CATALYST COMPOSITION PROVIDING 0.1 TO 1 PART OF TREITHYLENEDAMINE PER 100 PARTS OF SAID AROMATIC DIISOCYANATE AND FROM 0.01 TO 2.0 PARTS BY WEIGHT OF A LOWER TERTIARY IMINE PER 100 PARTS OF SAID AROMATIC DIISOCYANATE, SAID TERTIARY IMINE HAVING AT LEAST 3 BUT NOT MORE THAN 9 CARBON ATOMS PER MOLECULE AND 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) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |