Patent US2836585A successfully refreshed from Google Patents.
US2836585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing a vinyl halide polymer in the presence of gelatin
Assignee: Diamond Shamrock Corp
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Filing: 1954-03-26
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Granted: 1958-05-27
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Expires: 1974-03-26
Abstract
No abstract record available.
Inventors
- 👤 Hill Archie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:12
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; Y; Y10; Y10S; Y10S526/00; Y10S526/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
THE PROCESS FOR PRODUCING HIGH QUALITY POLYMER WHICH COMPRISES SUSPENDING IN WATER AN EHTHYLENICALLYUNSATURATED MONOMER CONTAINING AT LEAST 85% BY WEIGHT VINYL CHLORIDE WITH THE AID OF ABOUT 0.10% TO 0.45% OF GELATIN BASED ON THE WEIGHT OF SAID MONOMER, ADDING AN ACID TO LOWER THE PH OF THE AQUEOUS POLYMERIZATION MEDIUM BELOW THE ISOELECTRIC POINT OF THE SAID GELATIN AND POLYMERIZING SAID MONOMER WITH THE AID OF HEAT AND POLYMERIZING SAID MONOMER WITH THE AID OF HEAT PH OF THE THUS-FORMED SUSPENSION BELOW THE ISOELECTRIC POINT OF THE SAID GELATIN AND WITHIN THE RANGE FROM ABOUT 2 TO 5, INCLUSIVE.
Claim 2
Dependent Claim
101 words
THE PROCESS FOR PRODUCING HIGH QUALITY POLYMER WHICH COMPRISES SUSPENDING IN WATER AN EHTHYLENICALLYUNSATURATED MONOMER CONTAINING AT LEAST 85% BY WEIGHT VINYL CHLORIDE WITH THE AID OF ABOUT 0.10% TO 0.45% OF GELATIN BASED ON THE WEIGHT OF SAID MONOMER, ADDING AN ACID TO LOWER THE PH OF THE AQUEOUS POLYMERIZATION MEDIUM BELOW THE ISOELECTRIC POINT OF THE SAID GELATIN AND POLYMERIZING SAID MONOMER WITH THE AID OF HEAT AND POLYMERIZING SAID MONOMER WITH THE AID OF HEAT PH OF THE THUS-FORMED SUSPENSION BELOW THE ISOELECTRIC POINT OF THE SAID GELATIN AND WITHIN THE RANGE FROM ABOUT 2 TO 5, INCLUSIVE.
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) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |