US3899466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brominated xylene diols
Assignee: Ethyl Corp
•
Filing: 1973-05-25
•
Granted: 1975-08-12
•
Expires: 1993-05-25
Abstract
Abstract Compounds having the formula: WHERE X is a halogen, ester, hydroxyl, alkoxy, amine, cyanide, or isocyanate radicals. These compounds are useful as flame retardant additives for polymers, especially for polypropylene.
Inventors
- 👤 Michael Dubeck
- 👤 David R Brackenridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:29
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/053
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
A POLYOLEFIN COMPOSITION COMPRISING AN A-OLEFIN POLYMER AND A FLAME RETARDANT AMOUNT OF A TETRABROMINATED XYLENE COMPOUND OF THE GENERAL FORMULA
Claim 2
Dependent Claim
21 words
A POLYOLEFIN COMPOSITION COMPRISING AN A-OLEFIN POLYMER AND A FLAME RETARDANT AMOUNT OF A TETRABROMINATED XYLENE COMPOUND OF THE GENERAL FORMULA
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein said Alpha -olefin polymer is polypropylene.
Claim 4
Dependent Claim
39 words
The composition of claim 1 wherein said Alpha -olefin polymer is polypropylene and said tetrabrominated xylene compound is 2,3,5,6-tetrabromo-p-xylene- Alpha , Alpha ''-diol which is present at from about 2 to about 25 weight percent based upon said polypropylene.
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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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |