US2666047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromate-sulfite redox-initiated aqueous polymerization of vinyl chloride
Assignee: Diamond Shamrock Corp
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Filing: 1950-11-30
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Granted: 1954-01-12
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Expires: 1970-11-30
Abstract
No abstract record available.
Inventors
- 👤 Jr George J Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:24
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; Y; Y10; Y10S; Y10S526/00; Y10S526/911; Y10S526/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
THE METHOD OF POLYMERIZING VINYL CHLORIDE WHICH INCLUDES THE STEPS OF DISPERSING MONOMERIC VINYL CHLORIDE IN AN AQUEOUS MEDIUM CONTAINING A REDOX CATALYST SYSTEM COMPOSED OF CHROMATE IONS AND SULFITE IONS, AND RECOVERING A VINYL CHLORIDE POLYMER FROM SAID MEDIUM.
Claim 2
Independent Claim
40 words
THE METHOD OF POLYMERIZING VINYL CHLORIDE WHICH INCLUDES THE STEPS OF DISPERSING MONOMERIC VINYL CHLORIDE IN AN AQUEOUS MEDIUM CONTAINING A REDOX CATALYST SYSTEM COMPOSED OF CHROMATE IONS AND SULFITE IONS, AND RECOVERING A VINYL CHLORIDE POLYMER FROM SAID MEDIUM.
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) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |