US2569923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogenated unsaturated hydrocarbon production
Assignee: Shell Development Co
•
Filing: 1947-07-29
•
Granted: 1951-10-02
•
Expires: 1967-07-29
Abstract
No abstract record available.
Inventors
- 👤 Harry A Cheney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:16
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
THE PROCESS FOR THE PRODUCTION OF VINYL CHLORIDE WHICH COMPRISES PASSING ETHYLENE DICHLORIDE IN THE VAPOR PHASE AT A TEMPERATURE OF FROM ABOUT 425* C. TO 675* C. THROUGH A BED OF INERT GRAVEL CONSISTING OF SMOOTH SURFACED ROUNDED FRAGMENTS OF ROCK POSITIONED IN A REACTION ZONE OF RESTRICTED CROSS-SECTIONAL AREA.
Claim 2
Dependent Claim
51 words
THE PROCESS FOR THE PRODUCTION OF VINYL CHLORIDE WHICH COMPRISES PASSING ETHYLENE DICHLORIDE IN THE VAPOR PHASE AT A TEMPERATURE OF FROM ABOUT 425* C. TO 675* C. THROUGH A BED OF INERT GRAVEL CONSISTING OF SMOOTH SURFACED ROUNDED FRAGMENTS OF ROCK POSITIONED IN A REACTION ZONE OF RESTRICTED CROSS-SECTIONAL AREA.
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) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |