US2993030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing vinylene carbonate
Assignee: Individual
•
Filing: 1957-08-19
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Granted: 1961-07-18
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Expires: 1977-08-19
Abstract
No abstract record available.
Inventors
- 👤 George E Ham
- 👤 Zief Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:09
CPC Classifications
C; C08; C08F; C08F34/00; C08F34/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE PROCESS WHICH COMPRISES HOMOPOLYMERIZING VINYLENE CARBONATE BY AGITATING A MIXTURE OF WATER AND VINYLENE CARBONATE IN PROPORTIONS RANGING FROM 1 TO 10 PARTS BY WEIGHT OF VINYLENE CARBONATE WITH 1 TO 20 PARTS BY WEIGHT OF WATER IN THE PRESENCE OF 0.005 TO 5% BY WEIGHT BASED ON THE VINYLENE CARBONATE PRESENT IN SAID MIXTURE OF A PERSULFATE POLYMERIZING CATALYST SELECTED FROM THE GROUP CONSISTING OF AMMONIUM PERSULFATE AND ALKALI METAL PERSULFATES AT ATMOSPHERIC PRESSURE IN THE ABSENCE OF OXYGEN AND COLLECTING THE FINALLY DIVIDED WATER INSOLUBLE POLYMERIC VINYLENE CARBONATE WHICH IS FORMED.
Claim 2
Dependent Claim
94 words
THE PROCESS WHICH COMPRISES HOMOPOLYMERIZING VINYLENE CARBONATE BY AGITATING A MIXTURE OF WATER AND VINYLENE CARBONATE IN PROPORTIONS RANGING FROM 1 TO 10 PARTS BY WEIGHT OF VINYLENE CARBONATE WITH 1 TO 20 PARTS BY WEIGHT OF WATER IN THE PRESENCE OF 0.005 TO 5% BY WEIGHT BASED ON THE VINYLENE CARBONATE PRESENT IN SAID MIXTURE OF A PERSULFATE POLYMERIZING CATALYST SELECTED FROM THE GROUP CONSISTING OF AMMONIUM PERSULFATE AND ALKALI METAL PERSULFATES AT ATMOSPHERIC PRESSURE IN THE ABSENCE OF OXYGEN AND COLLECTING THE FINALLY DIVIDED WATER INSOLUBLE POLYMERIC VINYLENE CARBONATE WHICH IS FORMED.
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) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |