Patent US3369229A successfully refreshed from Google Patents.
US3055876A
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Suspending agents for vinyl polymerization
Assignee: Union Carbide Corp
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Filing: 1960-05-19
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Granted: 1962-09-25
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Expires: 1980-05-19
Abstract
No abstract record available.
Inventors
- 👤 Leonard C Grotz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:51
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/10; C08F2/00; C08F2/12; C08F2/16; C08F2/18; C08F2/20; C08L; C08L63/00; Y; Y10; Y10S; Y10S526/00; Y10S526/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN PROCESS FOR THE SUSPENSION POLYMERIZATION OF A VINYL MONOMER THE IMPROVEMENT WHICH COMPRISES POLYMERIZING SAID VINYL MONOMER IN AN AQUEOUS SUSPENSION CONTRAINING FROM ABOUT 0.05 WEIGHT PRESENT TO ABOUT 2 WEIGHT PERCENT, BASED UPON THE WEIGHT OF SAID VINYL MONOMER, OF A SUSPENDING AGENT, SAID SUSPENDING AGENT COMPRISING A WATER SOLUBLE CONDENSATION PRODUCT OF POLYETHYLENE GLYCOL WITH THE DIGLYCIDYL ETHER OF 2,2-BIS(4-HYDROXYPENYL) PROPANE, SAID CONDENSATION PRODUCT CONTAINING FROM ABOUT 1 WEIGHT PERCENT TO ABOUT 4 WEIGHT PECENT OF COMBINED DIGLYCIDYL ETHER OF 2,2-BIS(4-HYDROXYPENYL) PROPANE, BASED UPON THE WEIGHT OF COMBINED POLYETHYLENE GLYCOL, AND HAVING A REDUCTED VISCOSITY OF FROM ABOUT 0.3 TO ABOUT 0.6.
Claim 2
Dependent Claim
105 words
IN PROCESS FOR THE SUSPENSION POLYMERIZATION OF A VINYL MONOMER THE IMPROVEMENT WHICH COMPRISES POLYMERIZING SAID VINYL MONOMER IN AN AQUEOUS SUSPENSION CONTRAINING FROM ABOUT 0.05 WEIGHT PRESENT TO ABOUT 2 WEIGHT PERCENT, BASED UPON THE WEIGHT OF SAID VINYL MONOMER, OF A SUSPENDING AGENT, SAID SUSPENDING AGENT COMPRISING A WATER SOLUBLE CONDENSATION PRODUCT OF POLYETHYLENE GLYCOL WITH THE DIGLYCIDYL ETHER OF 2,2-BIS(4-HYDROXYPENYL) PROPANE, SAID CONDENSATION PRODUCT CONTAINING FROM ABOUT 1 WEIGHT PERCENT TO ABOUT 4 WEIGHT PECENT OF COMBINED DIGLYCIDYL ETHER OF 2,2-BIS(4-HYDROXYPENYL) PROPANE, BASED UPON THE WEIGHT OF COMBINED POLYETHYLENE GLYCOL, AND HAVING A REDUCTED VISCOSITY OF FROM ABOUT 0.3 TO ABOUT 0.6.
References Cited (Backward Citations)
US2731444A
Cited
US2872432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |