US3757001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for suspension polymerization of vinyl chloride
Assignee: Honeywell International Inc
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Filing: 1971-04-16
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Granted: 1973-09-04
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Expires: 1991-04-16
Abstract
Abstract IN SUSPENSION POLYMERIZATION OF VINYL CHLORIDE IN AQUEOUS MEDIA IN CLOSED POLYMERIZATION VESSELS IN THE PRESENCE OF CONVENTIONAL SUSPENDING AGENTS AND OIL-SOLUBLE POLYMERIZATION INITIATORS, ADHESION OF POLYMER TO THE INNER WALL OF THE POLYMERIZATION VESSEL IS ELIMINATED OR SUBSTANTIALLY REDUCED BY (1) CONDUCTING THE POLYMERIZATION IN AN ACIDIC AQUEOUS MEDIUM, IN CONJUCTION WITH (2) PRESENCE DURING THE POLYMERIZATION IN THE POLYMERIZATION MASS OF OXIDIZED POLYETHYLENE HAVING A MINIMUM NUMBER AVERAGE MOLECULAR WEIGHT OF ABOUT 1000, CONTAINING BETWEEN ABOUT 1 AND 5% BY WEIGHT OF OXYGEN, AND HAVING AN ACID NUMBER OF FROM 9 TO ABOUT 35.
Inventors
- 👤 W Reiter
- 👤 A Reventas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:57
CPC Classifications
C; C08; C08F; C08F114/00; C08F114/02; C08F114/04; C08F114/06; C08F255/00; C08F255/02; C08F255/023
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |