Patent US2532727A successfully refreshed from Google Patents.
US2532727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for obtaining vinyl chloride/styrene polymers
Assignee: EIDP Inc
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Filing: 1947-05-08
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Granted: 1950-12-05
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Expires: 1967-05-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Larchar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:16
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR OBTAINING VINYL CHLORIDE/STYRENE POLYMERS WHICH COMPRISES HEATING AT A TEMPERATURE OF FROM 50*C. TO 100*C. IN THE PRESENCE OF A POLYMERIZATION CATALYST AND UNDER A PRESSURE OF AT LEAST 3000 ATOMOSPHERES A MIXTURE OF VINYL CHLORIDE AND STYRENE IN A MOLE RATIO OF FROM 6.5 TO 30 MILES OF VINYL CHLORIDE PER MOLE OF STYRENE.
Claim 2
Dependent Claim
58 words
A PROCESS FOR OBTAINING VINYL CHLORIDE/STYRENE POLYMERS WHICH COMPRISES HEATING AT A TEMPERATURE OF FROM 50*C. TO 100*C. IN THE PRESENCE OF A POLYMERIZATION CATALYST AND UNDER A PRESSURE OF AT LEAST 3000 ATOMOSPHERES A MIXTURE OF VINYL CHLORIDE AND STYRENE IN A MOLE RATIO OF FROM 6.5 TO 30 MILES OF VINYL CHLORIDE PER MOLE OF STYRENE.
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) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |