US3585185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ester-containing polyols
Assignee: Wyandotte Chemicals Corp
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Filing: 1968-05-13
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Granted: 1971-06-15
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Expires: 1988-05-13
Abstract
Abstract ESTER-CONTAINING POLYOLS ARE PREPARED BY THE REACTION OF ALKYLENE OXIDE CONDENSATES OF ORGANIC COMPOUNDS HAVING AT LEAST TWO ACTIVE HYDROGEN ATOMS WITH HALOGEN-CONTAINING ORGANIC ACID ANHYDRIDES AND ALKYLENE OXIDES. THE POLYOLS ARE PARTICULARLY USEFUL IN THE PREPARATION OF FLAMERETARDANT POLYURETHANE FOAMS.
Inventors
- 👤 William W Levis Jr
- 👤 Louis C Pizzini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:04
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/46; C08G18/4607; C08G18/67; C08G18/68; C08G18/683; C08G18/686; C08G2101/00
Claims Analysis
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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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |