US3420786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-extinguishing styrene polymer composition containing a bromine compound and 2,3 - dimethyl - 2,3 - diphenyl butane
Assignee: BASF SE
•
Filing: 1966-03-22
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Granted: 1969-01-07
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Expires: 1986-03-22
Abstract
No abstract record available.
Inventors
- 👤 Heinz Weber
- 👤 Heinz Burger
- 👤 Guenther Daumiller
- 👤 Herbert Willersinn
- 👤 Johannes Grohmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:22
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/01; Y; Y10; Y10S; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
102 words
A SELF-EXTINGUISHING EXPANDED ARTICLE OF PLASTIC COMPRISING A POROUS MOLDING OF A STYRENE POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYSTYRENE AND COPOLYMERS CONTAINING AT LEAST 50% BY WEIGHT OF COPOLYMERIZED STYRENE UNITS, SAID MOLDING CONTAINING AS A FLAME RETARDANT: A MIXTURE OF AN ORGANIC BROMINATED COMPOUND WHICH CONTAINS AT LEAST FOUR CARBON ATOMS AND MORE THAN 40% OF BROMINE; AND 2,3-DIMETHYL-2,3-DIPHENYLBUTANE IN AN AMOUNT OF 0.01 TO 5% BY WEIGHT ON THE WEIGHT OF STYRENE POLYMER; THE AMOUNT OF THE ORGANIC BROMINATED COMPOUND BEING SUCH THAT THE EXPANDED PLASTIC ARTICLE HAS A CONTENT OF AT LEAST 0.1% BY WEIGHT OF BROMINE.
References Cited (Backward Citations)
US3271333A
Cited
US3274133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |