Patent US2395956A successfully refreshed from Google Patents.
US2395956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the recovery of unsaturated hydrocarbons from mixtures containing the same
Assignee: United Gas Improvement Co
•
Filing: 1942-09-03
•
Granted: 1946-03-05
•
Expires: 1962-09-03
Abstract
No abstract record available.
Inventors
- 👤 Frank J Soday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:27
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/152; C07C7/156
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-03-04 | 1949-09-03 | 1950-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-03-04 | 1953-09-03 | 1954-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-03-04 | 1957-09-03 | 1958-03-05 | $7700.00 | Window Closed / Lapsed |