US3296222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for continuously chlorosulfonating polyethylene at higher temperatures
Assignee: EIDP Inc
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Filing: 1963-12-27
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Granted: 1967-01-03
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Expires: 1983-12-27
Abstract
No abstract record available.
Inventors
- 👤 Dixon Stanley
- 👤 Ennis Royce Elton
- 👤 Kalil James
- 👤 Knabeschuh Louis Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:04
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34; C08F8/18; C08F8/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A PROCESS FOR CONTINUOUSLY CHLOROSULONATING POLYETHYLENE WHICH COMPRISES (1) RAPIDLY MIXING CHLORINE AND SULFUR DIOXIDE IN A MIXER WITH AN INERT VOLATILE SOLVENT SOLUTION OF POLYETHYLENE TO A HOMOGENEOUS MIXTURE AT A TEMPERATURE OF FROM ABOUT 85* TO 105*C. AND SUFFICIENT PRESSURE TO MAINTAIN ALL COMPONENTS IN THE LIQUID PHASE, (2) PASSING SAID MIXTURE FROM SAID MIXER INTO A REACTION VESSEL, BEFORE MORE THAN ABOUT 1/5 OF THE CHLORINE HAS REACTED DURING MIXING, SAID VESSEL BEING MAINTAINED AT A TEMPERATURE OF FROM ABOUT 90* TO 250*C. AND SUFFICIENT PRESSURE TO MAINTAIN ALL COMPONENTS IN THE LIQUID PHASE, THE TEMPERATURE OF SAID MIXTURE BEING ABOVE 140* C. PRIOR TO ARRESTING THE REACTION, AND (3) ARRESTING THE REACTION BEFORE ALL THE CHLORINE HAS REACTED BY PASSING SAID MIXTURE TO A CHAMBER OF LOWER PRESSURE WHEREIN THE UNREACTED CHLORINE AND SULFUR DIOXIDE ARE EVAPORATED.
Claim 2
Dependent Claim
141 words
A PROCESS FOR CONTINUOUSLY CHLOROSULONATING POLYETHYLENE WHICH COMPRISES (1) RAPIDLY MIXING CHLORINE AND SULFUR DIOXIDE IN A MIXER WITH AN INERT VOLATILE SOLVENT SOLUTION OF POLYETHYLENE TO A HOMOGENEOUS MIXTURE AT A TEMPERATURE OF FROM ABOUT 85* TO 105*C. AND SUFFICIENT PRESSURE TO MAINTAIN ALL COMPONENTS IN THE LIQUID PHASE, (2) PASSING SAID MIXTURE FROM SAID MIXER INTO A REACTION VESSEL, BEFORE MORE THAN ABOUT 1/5 OF THE CHLORINE HAS REACTED DURING MIXING, SAID VESSEL BEING MAINTAINED AT A TEMPERATURE OF FROM ABOUT 90* TO 250*C. AND SUFFICIENT PRESSURE TO MAINTAIN ALL COMPONENTS IN THE LIQUID PHASE, THE TEMPERATURE OF SAID MIXTURE BEING ABOVE 140* C. PRIOR TO ARRESTING THE REACTION, AND (3) ARRESTING THE REACTION BEFORE ALL THE CHLORINE HAS REACTED BY PASSING SAID MIXTURE TO A CHAMBER OF LOWER PRESSURE WHEREIN THE UNREACTED CHLORINE AND SULFUR DIOXIDE ARE EVAPORATED.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |