Patent US2838507A successfully refreshed from Google Patents.
Patent US3399157A successfully refreshed from Google Patents.
US3399157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of ethylene/vinyl chloride latices
Assignee: Monsanto Co
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Filing: 1965-01-06
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Granted: 1968-08-27
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Expires: 1985-01-06
Abstract
No abstract record available.
Inventors
- 👤 Oliver De S Deex
- 👤 Charles E Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:38
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/06; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A PROCESS FOR PREPARING STABLE ETHYLENE/VINYL CHLORIDE COPOLYMER LATICES, SAID COPOLYMER HAVING A POLYMERIZED VINYL CHLORIDE CONTENT FROM ABOUT 60 TO ABOUT 85% BY WEIGHT OF SAID COPOLYMER, BY ADDING TO AN ETHYLENE-VINYL CHLORIDE MONOMER SYSTEM A NONIONIC EMULSIFYING AGENT HAVING A HLB VALUE OF FROM ABOUT 10 TO ABOUT 17 OR AN ANIONIC EMULSIFYING AGENT HAVING A HLB VALUE OF AT LEAST ABOUT 10, THE IMPROVEMENT COMPRISING ADDING TO SAID MONOMER SYSTEM PRIOR TO POLYMERIZATION FROM ABOUT 15% TO ABOUT 95% BY WEIGHT OF THE THEORETICAL AMOUNT NECESSARY TO PROVIDE A MONOMOLECULAR LAYER ON THE POLYMER SOLIDS OF SAID EMULSIFYING AGENT, AND ADDING AFTER POLYMERIZATION A SECOND QUANTITY OF EMULSIFYING AGENT SUFFICIENT TO BRING THE TOTAL EMULSIFIER CONTENT TO FROM ABOUT 25% TO ABOUT 150% OF SAID THEORETICAL AMOUNT.
Claim 2
Dependent Claim
131 words
IN A PROCESS FOR PREPARING STABLE ETHYLENE/VINYL CHLORIDE COPOLYMER LATICES, SAID COPOLYMER HAVING A POLYMERIZED VINYL CHLORIDE CONTENT FROM ABOUT 60 TO ABOUT 85% BY WEIGHT OF SAID COPOLYMER, BY ADDING TO AN ETHYLENE-VINYL CHLORIDE MONOMER SYSTEM A NONIONIC EMULSIFYING AGENT HAVING A HLB VALUE OF FROM ABOUT 10 TO ABOUT 17 OR AN ANIONIC EMULSIFYING AGENT HAVING A HLB VALUE OF AT LEAST ABOUT 10, THE IMPROVEMENT COMPRISING ADDING TO SAID MONOMER SYSTEM PRIOR TO POLYMERIZATION FROM ABOUT 15% TO ABOUT 95% BY WEIGHT OF THE THEORETICAL AMOUNT NECESSARY TO PROVIDE A MONOMOLECULAR LAYER ON THE POLYMER SOLIDS OF SAID EMULSIFYING AGENT, AND ADDING AFTER POLYMERIZATION A SECOND QUANTITY OF EMULSIFYING AGENT SUFFICIENT TO BRING THE TOTAL EMULSIFIER CONTENT TO FROM ABOUT 25% TO ABOUT 150% OF SAID THEORETICAL AMOUNT.
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) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |