Patent US4007140A successfully refreshed from Google Patents.
US4007140A
Expired / Lapsed
US
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Tertiary amines as catalysts in polyurethane manufacture
Assignee: Imperial Chemical Industries Ltd
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Filing: 1975-01-08
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Granted: 1977-02-08
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Expires: 1995-01-08
Abstract
Abstract A tertiary amine having the general formula: <IMAGE> wherein X is the residue of an organic acid X(OH)n, n being the number of acidic groups present in the acid. The amines are useful as catalysts in the production of polyurethanes.
Inventors
- 👤 Arthur Ibbotson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:49
CPC Classifications
C; C07; C07C; C07C335/00; C07C335/04; C07C335/14; C07C335/16; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1841
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A method for the manufacture of polyurethane which comprises reacting an organic polyisocyanate with an organic polyol in the presence of a catalytically effective amount of N,n'-bis(3-dimethylaminopropylamino)urea.
Claim 2
Independent Claim
27 words
A method for the manufacture of polyurethane which comprises reacting an organic polyisocyanate with an organic polyol in the presence of a catalytically effective amount of N,n'-bis(3-dimethylaminopropylamino)urea.
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) | 1980-02-08 | 1980-08-09 | 1981-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-08 | 1984-08-09 | 1985-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-08 | 1988-08-09 | 1989-02-08 | $7700.00 | Window Closed / Lapsed |