US2497828A
Expired / Lapsed
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Controlling polymerization reactions
Assignee: EIDP Inc
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Filing: 1945-05-22
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Granted: 1950-02-14
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Expires: 1965-05-22
Abstract
No abstract record available.
Inventors
- 👤 James H Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:18
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/02; C08F18/04; C08F18/08; C08F4/00; C08F4/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PROCESS FOR POLYMERIZING VINYL ACETATE IN AQUEOUS EMULSION IN THE PRESENCE OF HYDROGEN PERIOXIDE AS CATALYST AND FORMALDEHYDE SULFOXYLATE AS ACTIVATOR THEREFORE CHARACTERIZED IN THAT THE RELATIVE CONCENTRATIONS OF SAID PEROXIDE AND SULFOXYLATE ARE CONTROLLED IN RESPONSE TO MEASUREMENTS OF THE OXIDATION-REDUCTION POTENTIAL OF THE REACTION MIXTURE WITHIN A RANGE NOT EXCEEDING 200 MILLIVOLTS.
Claim 2
Dependent Claim
55 words
A PROCESS FOR POLYMERIZING VINYL ACETATE IN AQUEOUS EMULSION IN THE PRESENCE OF HYDROGEN PERIOXIDE AS CATALYST AND FORMALDEHYDE SULFOXYLATE AS ACTIVATOR THEREFORE CHARACTERIZED IN THAT THE RELATIVE CONCENTRATIONS OF SAID PEROXIDE AND SULFOXYLATE ARE CONTROLLED IN RESPONSE TO MEASUREMENTS OF THE OXIDATION-REDUCTION POTENTIAL OF THE REACTION MIXTURE WITHIN A RANGE NOT EXCEEDING 200 MILLIVOLTS.
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) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |