Patent US3696084A successfully refreshed from Google Patents.
US3696084A
Expired / Lapsed
US
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Process for replacing chloride groups in polyvinyl chloride
Assignee: ConocoPhillips Co
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Filing: 1970-09-17
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Granted: 1972-10-03
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Expires: 1990-09-17
Abstract
Abstract A PORTION OF THE CHLORINE IONS IN POLYVINYL CHLORIDE IS REPLACED BY A DIFFERENT NUCLEOPHYLIC FUNCTIONAL GROUP BY HEATING THE POLYVINYL CHLORIDE POLYMER AND A MATERIAL CONTAINING THE REPLACING FUNCTIONAL GROUP IN THE PRESENCE OF A QUATERNARY PHOSPHONIUM OR ARSONIUM SALT CATALYST AT A TEMPERATURE OF FROM ABOUT 25*C. TO ABOUT 200*C., WITH OR WITHOUT A SOLVENT, FOR A PERIOD FROM ABOUT TWO HOURS TO ABOUT FORTY-EIGHT HOURS.
Inventors
- 👤 Ronnie D Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:24
CPC Classifications
C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 0
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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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |