US2442230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azeotropic distillation of chloroethyl benzene from chlorostyrene
Assignee: Gulf Research and Development Co
•
Filing: 1947-05-07
•
Granted: 1948-05-25
•
Expires: 1967-05-07
Abstract
No abstract record available.
Inventors
- 👤 Berg Lloyd
- 👤 James M Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:24
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38; C07C17/383; C07C17/386
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE616596C
Cited
US2380019A
Cited
US2411106A
Cited
US2398689A
Cited
US2385235A
Cited
US2397653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-25 | 1951-11-24 | 1952-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-25 | 1955-11-24 | 1956-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-25 | 1959-11-24 | 1960-05-25 | $7700.00 | Window Closed / Lapsed |