US2843576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of vinyl compounds
Assignee: Ethyl Corp
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Filing: 1953-12-03
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Granted: 1958-07-15
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Expires: 1973-12-03
Abstract
No abstract record available.
Inventors
- 👤 James H Dunn
- 👤 Percy W Trotter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:03
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24; C08F14/00; C08F14/02; C08F14/04; C08F14/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR POLYMERIZING VINYL COMPOUNDS COMPRISING CONDUCTING THE POLYMERIZATION AT A TEMPERATURE BETWEEN 0* TO 150*C. IN AN AQUEOUS EMULSION SYSTEM CONSISTING ESSENTIALLY OF WATER, AN EMULSIFYING AGENT AND A WATER INSOLUBLE CATALYST WHICH IS SOLUBLE IN THE VINYL COMPOUND TO BE POLYMERIZED, SAID EMULSIFYING AGENT BEING PRESENT IN A CONCENTRATION OF BETWEEN ABOUT 4 AND 8 PERCNT BASED UPON THE WEIGHT OF SAID VINYL COMPOUND.
Claim 2
Dependent Claim
67 words
A PROCESS FOR POLYMERIZING VINYL COMPOUNDS COMPRISING CONDUCTING THE POLYMERIZATION AT A TEMPERATURE BETWEEN 0* TO 150*C. IN AN AQUEOUS EMULSION SYSTEM CONSISTING ESSENTIALLY OF WATER, AN EMULSIFYING AGENT AND A WATER INSOLUBLE CATALYST WHICH IS SOLUBLE IN THE VINYL COMPOUND TO BE POLYMERIZED, SAID EMULSIFYING AGENT BEING PRESENT IN A CONCENTRATION OF BETWEEN ABOUT 4 AND 8 PERCNT BASED UPON THE WEIGHT OF SAID VINYL COMPOUND.
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) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |