US3567665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane resins containing brominated polyol ethers
Assignee: Celanese Corp
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Filing: 1967-11-16
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Granted: 1971-03-02
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Expires: 1987-11-16
Abstract
Abstract WHEREIN N REPRESENTS AN INTEGER FROM 1 TO 4. (CH2-O-CH2-CH(-BR)-CH2-BR)N (HO-CH2)(4-N)-(4-(HO-)TETRAHYDROPYRAN-3,3,5,5-TETRAYL)- A FLAME-RTARDANT POLYURETHANE RESIN IS FORMED FROM A MIXTURE COMPRISING AT LEAST ONE ORGANIC POLYISOCYANATE AND AT LEAST ONE BROMINATED POLYOL ETHER WHICH CAN BE A 2, 3-DIBROMOPROPYL ETHER OF SORBITOL OR A 2,3-DIBROMOPROPYL ETHER HAVING THE GENERAL FORMULA:
Inventors
- 👤 Sammy Carpenter
- 👤 Enrique R Witt
- 👤 Joseph J Cahill Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:47
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3802; C08G18/3804; C08G18/3806; C08G18/381; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/13; C07C43/137; C07D; C07D309/00; C07D309/02; C07D309/08; C07D309/10; C08G18/40; C08G18/48; C08G18/50; C08G18/5003; C08G18/5006; C08G18/5012
Claims Analysis
Total Claims: 0
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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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |