Patent US3017399A successfully refreshed from Google Patents.
US3017399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of vinyl chloride polymers
Assignee: Escambia Chemical Corp
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Filing: 1958-05-16
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Granted: 1962-01-16
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Expires: 1978-05-16
Abstract
No abstract record available.
Inventors
- 👤 Robert S Holdsworth
- 👤 Smith William Mayo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:50
CPC Classifications
C; C08; C08F; C08F114/00; C08F114/02; C08F114/04; C08F114/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
THE PROCESS OF PRODUCAING SUBSTANTIALLY UNIFORM, LARGE PARTICLE SIZE POLYVINYL CHLORIDE BEADS, OF A SIZE OF AT LEAST 80 MESH, WHICH CONSISTS IN POLYMERIZING A MONOMER COMPRISING VINYL CHLORIDE AT A TEMPERATURE BETWEEN ABOUT 30*C. AND 70*C. AND AT A PH BELOW ABOUT 7.0 WHILE SUSPENDED IN AN AQUEOUS SUSPENSION MEDIUM CONSISTING ESSENTIALLY OF AN OIL-SOLUBLE FREE RADICALS POLYMERIZATION CATALYST, AN ALKYLENE POLYAMINE AND A SURFACEACTIVE AGENT SELECTED FROM THE GROUP CONSISTING OF ORGANIC SULFATES AND ORGANIC SULFONATES, SAID POLYAMINE AND SAID SURFACE-ACTIVE AGENT EACH BEING PRESENT IN AN AMOUNT WITHIN THE RANGE OF ABOUT 0.01 T ABOUT 1.0 PART PER 100 PARTS OF VINYL CHLORIDE.
Claim 2
Dependent Claim
106 words
THE PROCESS OF PRODUCAING SUBSTANTIALLY UNIFORM, LARGE PARTICLE SIZE POLYVINYL CHLORIDE BEADS, OF A SIZE OF AT LEAST 80 MESH, WHICH CONSISTS IN POLYMERIZING A MONOMER COMPRISING VINYL CHLORIDE AT A TEMPERATURE BETWEEN ABOUT 30*C. AND 70*C. AND AT A PH BELOW ABOUT 7.0 WHILE SUSPENDED IN AN AQUEOUS SUSPENSION MEDIUM CONSISTING ESSENTIALLY OF AN OIL-SOLUBLE FREE RADICALS POLYMERIZATION CATALYST, AN ALKYLENE POLYAMINE AND A SURFACEACTIVE AGENT SELECTED FROM THE GROUP CONSISTING OF ORGANIC SULFATES AND ORGANIC SULFONATES, SAID POLYAMINE AND SAID SURFACE-ACTIVE AGENT EACH BEING PRESENT IN AN AMOUNT WITHIN THE RANGE OF ABOUT 0.01 T ABOUT 1.0 PART PER 100 PARTS OF VINYL CHLORIDE.
References Cited (Backward Citations)
US2694053A
Cited
US2604468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-15 | 1965-07-17 | 1966-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-15 | 1969-07-17 | 1970-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-15 | 1973-07-17 | 1974-01-16 | $7700.00 | Window Closed / Lapsed |