US3293226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the halogenation of polymers and copolymers of butadiene
Assignee: Shell USA Inc
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Filing: 1963-11-08
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Granted: 1966-12-20
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Expires: 1983-11-08
Abstract
No abstract record available.
Inventors
- 👤 Schrijver Emery A F De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:24
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/12; C08F; C08F8/00; C08F8/18; C08F8/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
THE PROCESS FOR HALOGENATING A RUBBERY BUTADIENE POLYMER CONTAINING AT LEAST ABOUT 65% BY WEIGHT OF BUTADIENE COMPRISING REACTING THE POLYMER WITH AN ELEMENTAL HALOGEN HAVING AN ATOMIC WEIGHT GREATER THAN 30 IN A TETRAHALOMETHANE SOLVENT AT TEMPERATURES BETWEEN ABOUT -30*C. AND +50*C. IN THE PRESENCE OF 1-15 ATMOSPHERES HYDROGEN HALIDE PRESSURE WHEREBY A HALOGENATED POLYMER HAVING 40-68% BY WEIGHT OF HALOGEN SEPARATES FROM THE TETRAHALOMETHANE AND IS SEPARATED THEREFROM.
Claim 2
Dependent Claim
70 words
THE PROCESS FOR HALOGENATING A RUBBERY BUTADIENE POLYMER CONTAINING AT LEAST ABOUT 65% BY WEIGHT OF BUTADIENE COMPRISING REACTING THE POLYMER WITH AN ELEMENTAL HALOGEN HAVING AN ATOMIC WEIGHT GREATER THAN 30 IN A TETRAHALOMETHANE SOLVENT AT TEMPERATURES BETWEEN ABOUT -30*C. AND +50*C. IN THE PRESENCE OF 1-15 ATMOSPHERES HYDROGEN HALIDE PRESSURE WHEREBY A HALOGENATED POLYMER HAVING 40-68% BY WEIGHT OF HALOGEN SEPARATES FROM THE TETRAHALOMETHANE AND IS SEPARATED THEREFROM.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |