Patent US3833641A successfully refreshed from Google Patents.
US3833641A
Expired / Lapsed
US
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Halo-aryl amide-ester polyols
Assignee: Lyondell Chemical Technology LP
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Filing: 1971-08-16
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Granted: 1974-09-03
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Expires: 1991-08-16
Abstract
Abstract NOVEL AROMATIC COMPOUNDS ARE PROVIDED IN WHICH THE AROMATIC NUCLEUS HAS BONDED THERETO (1) AT LEAST ONE BROMINE OR CHLORINE ATOM, (2) AN AMIDO GROUP WHEREIN NITROGEN IS BONDED TO AT LEAST ONE HYDROXYALKYL GROUP OR AN ORGANIC MOIETY BEARING A HYDROXYALKYL GROUP, AND (3) A HYDROXYL-TERMINATED OXYALKYLATED CARBOXYLIC ACID ESTER GROUP. THE HALOGEN-SUBSTITUTED AROMATIC AMIDE-ESTER POLYOLS OF THE INVENTION ARE USEFUL IN IMPARTING FLAME-RETARDANCY TO ORGANIC POLYMERS NORMALLY SUSCEPTIBLE TO BURNING INCLUDING POLYURETHANES SUCH AS, IN PARTICULAR, FLEXIBLE POLYURETHANE FOAMS.
Inventors
- 👤 A Papa
- 👤 W Proops
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:47
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3823; C08G18/3825; C08K; C08K5/00; C08K5/16; C08K5/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |