Patent US2249847A successfully refreshed from Google Patents.
US2249847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery method for cyclic vapor phase reaction products
Assignee: Carbide and Carbon Chemicals Corp
•
Filing: 1938-05-27
•
Granted: 1941-07-22
•
Expires: 1958-05-27
Abstract
No abstract record available.
Inventors
- 👤 Irvin L Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:49
CPC Classifications
C; C07; C07C; C07C53/00; C07C53/12; B; B01; B01J; B01J19/00; B01J19/0006; B01J19/0013; C07C45/00; C07C45/002; C07C45/78; C07C45/81; C07C45/82; C07C45/87; C07C45/88; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00083; B01J2219/00105; B01J2219/00108; B01J2219/00162
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) | 1944-07-21 | 1945-01-20 | 1945-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-21 | 1949-01-20 | 1949-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-21 | 1953-01-20 | 1953-07-22 | $7700.00 | Window Closed / Lapsed |