Patent US2875186A successfully refreshed from Google Patents.
US2875186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing vinyl chloride in the presence of methyl cellulose gelatin and inert solvent
Assignee: Occidental Chemical Corp
•
Filing: 1954-12-09
•
Granted: 1959-02-24
•
Expires: 1974-12-09
Abstract
No abstract record available.
Inventors
- 👤 Ii James R Gerhard
- 👤 Claude C Deegan
- 👤 Jr Thomas W Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:21
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; Y; Y10; Y10S; Y10S521/00; Y10S521/921; Y10S526/00; Y10S526/91; Y10S526/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
PROCESS WHICH COMPRISES POLYMERIZING VINYL CHLORIDE IN SUSPENSION IN AN AQUEOUS MEDIUM, AND IN THE PRESENCE OF FROM 0.5 TO 25% BASED ON THE WEIGHT OF THE VINYL CHLORIDE, OF AN INERT SOLVENT FOR VINYL CHLORIDE SELECTED FROM THE GROUP CONSISTING OF BENZENE, TOLUENE, BUTANE, PENTANE, HEXANE, PETROLEUM ETHER, NAPHTHA, AND ETHYLENE DICHLORIDE, SAID AQUEOUS MEDIUM HAVING DISSOLVED THEREIN BOTH GELATIN AND METHYL CELLULOSE, THE TOTAL WEIGHT OF SAID DISSOLVED METHYL CELLULOSE AND GELATIN BEING FROM 0.08% OF THE WEIGHT OF SIAD AQUEOUS MEDIUM, AND THE RATIO OF THE WEIGHT OF SAID GELATIN TO THE WEIGHT OF SAID METHYL CELLULOSE BEING FROM 3:1 TO 1:3.
Claim 2
Dependent Claim
105 words
PROCESS WHICH COMPRISES POLYMERIZING VINYL CHLORIDE IN SUSPENSION IN AN AQUEOUS MEDIUM, AND IN THE PRESENCE OF FROM 0.5 TO 25% BASED ON THE WEIGHT OF THE VINYL CHLORIDE, OF AN INERT SOLVENT FOR VINYL CHLORIDE SELECTED FROM THE GROUP CONSISTING OF BENZENE, TOLUENE, BUTANE, PENTANE, HEXANE, PETROLEUM ETHER, NAPHTHA, AND ETHYLENE DICHLORIDE, SAID AQUEOUS MEDIUM HAVING DISSOLVED THEREIN BOTH GELATIN AND METHYL CELLULOSE, THE TOTAL WEIGHT OF SAID DISSOLVED METHYL CELLULOSE AND GELATIN BEING FROM 0.08% OF THE WEIGHT OF SIAD AQUEOUS MEDIUM, AND THE RATIO OF THE WEIGHT OF SAID GELATIN TO THE WEIGHT OF SAID METHYL CELLULOSE BEING FROM 3:1 TO 1:3.
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) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |