US3142709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of vinyl chloride
Assignee: Monsanto Co
•
Filing: 1961-05-22
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Granted: 1964-07-28
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Expires: 1981-05-22
Abstract
No abstract record available.
Inventors
- 👤 Edward H Gause
- 👤 Phillip D Montgomery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:31
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR THE PURIFICATION OF VINYL CHLORIDE CONTAINING MINOR AMOUNTS OF BUTADIENE WHICH CONSIST OF INTIMATELY CONTACTING SAID VINYL CHLORIDE IN THE LIQUID PHASE WITH ANHYDROUS HYDROGEN CHLORIDE IN AN AMOUNT FROM ABOUT 0.5% TO ABOUT 5% BY WEIGHT OF SAID VINYL CHLORIDE AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 0*C. TO ABOUT 100*C. FOR A PERIOD OF TIME FROM ABOUT 5 MINUTES TO ABOUT 5 HOURS AND RECOVERING SAID VINYL CHLORIDE.
Claim 2
Dependent Claim
74 words
A PROCESS FOR THE PURIFICATION OF VINYL CHLORIDE CONTAINING MINOR AMOUNTS OF BUTADIENE WHICH CONSIST OF INTIMATELY CONTACTING SAID VINYL CHLORIDE IN THE LIQUID PHASE WITH ANHYDROUS HYDROGEN CHLORIDE IN AN AMOUNT FROM ABOUT 0.5% TO ABOUT 5% BY WEIGHT OF SAID VINYL CHLORIDE AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 0*C. TO ABOUT 100*C. FOR A PERIOD OF TIME FROM ABOUT 5 MINUTES TO ABOUT 5 HOURS AND RECOVERING SAID VINYL CHLORIDE.
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) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |