US3721645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes stabilized with 1,2,3-,1,2,4-1,2,5-,and 1,3,4-triazoles
Assignee: Liner Technology Inc
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Filing: 1971-02-25
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Granted: 1973-03-20
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Expires: 1991-02-25
Abstract
Abstract Improved process for preparation of stabilized but reactive polyurethanes, the stabilizer compositions containing amounts of either substituted or unsubstituted triazoles, and the polyurethane compositions prepared from di- or poly-isocyanates, polyols, and at least one of the selected triazoles.
Inventors
- 👤 J Zemlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:30
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/807; C08G18/08; C08G18/10; C08G2150/00; C08G2150/20; C08G2250/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
11 words
The composition of claim 1 in which the triazole is 1,2,3-triazole.
Claim 2
Dependent Claim
11 words
The composition of claim 1 in which the triazole is 1,2,5-triazole.
Claim 3
Dependent Claim
11 words
The composition of claim 1 in which the triazole is 1,2,4-triazole.
Claim 4
Dependent Claim
11 words
The composition of claim 1 in which the triazole is 1,3,4-triazole.
Claim 5
Dependent Claim
23 words
The composition of claim 1 in which the triazole is present in amounts of from 0.1 to 1.0 equivalents per equivalent of isocyanate.
Claim 6
Dependent Claim
11 words
The composition of claim 1 in which the triazole is 1,2,3-benzotriazole.
Claim 7
Dependent Claim
11 words
The composition of claim 1 in which the triazole is 1,2,3-tolyltriazole.
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |