Patent US2552425A successfully refreshed from Google Patents.
US2552425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing vinyl chloride
Assignee: Individual
•
Filing: 1948-02-19
•
Granted: 1951-05-08
•
Expires: 1968-02-19
Abstract
No abstract record available.
Inventors
- 👤 Halbig Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:00
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/07; C07C17/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
102 words
THE METHOD OF PRODUCING VINYL CHLORIDE, COMPRISING THE STEPS OF CONDUCTING ACETYLENE AND HYDROGEN CHLORIDE VAPOR OVER A HEATED CATALYST CONTAINING MERCURY CHLORIDE, OF DIVIDING THE RESULTING REACTION MIXTURE INTO TWO PARTS, OF SEPARATING VINYL CHLORIDE FROM ONE OF SAID PARTS OF AGAIN PASSING THE REMAINDER OF THE PART FROM WHICH VINYL CHLORIDE HAS BEEN SEPARATED TOGETHER WITH THE OTHER PART OVER THE CATALYST, AND OF SO PROPORTIONING SAID PARTS THAT THE HEAT OF REACTION OF THE ACETYLENE WITH THE HYDROGEN CHLORIDE PROVIDES THE HEAT REQUIRED BY THE PROCESS AND THE TEMPERATURE OF THE CATALYST IS MAINTAINED AT 5/* TO 60* CENTRIGADE.
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) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |