Patent US3899463A successfully refreshed from Google Patents.
US3899463A
Expired / Lapsed
US
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Flame-retardant composition
Assignee: Cities Service Co
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Filing: 1973-10-03
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Granted: 1975-08-12
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Expires: 1993-10-03
Abstract
Abstract A normally flammable organic polymer is rendered flame retardant by the incorporation of a compound corresponding to the formula: WHEREIN X is chloro or bromo, Q is halo, hydrogen, or a hydrocarbyl or hydrocarbyloxy group, and Z is a divalent saturated polybromocycloalkylene group containing 5-16 carbon atoms and 2-6 bromine atoms. Such flame retardants include, e.g., 5,6-dibromo-1,10,11,12,13,13hexachlorotricyclo(8.2.1.02,9)tridecene-11, i.e., the dibrominated 1:1 Diels-Alder adduct of hexachlorocyclopentadiene and cyclooctadiene-1,5. If desired, the flame retardant may be employed in conjunction with a synergist, such as antimony trioxide.
Inventors
- 👤 Jack Newcombe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:00
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A COMPOSITION COMPRISING A NORMALLY FLAMMABLE ORGANIC POLYMER AND A FLAME RETARDANT CORRESPONDING TO THE FORMULA:
Claim 2
Dependent Claim
16 words
A COMPOSITION COMPRISING A NORMALLY FLAMMABLE ORGANIC POLYMER AND A FLAME RETARDANT CORRESPONDING TO THE FORMULA:
References Cited (Backward Citations)
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 |