US2473943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of impregnating carbonaceous bodies
Assignee: Thomas A Edison Inc
•
Filing: 1945-04-06
•
Granted: 1949-06-21
•
Expires: 1965-04-06
Abstract
No abstract record available.
Inventors
- 👤 Le Roy S Dunham
- 👤 Einar V Steffensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:47
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/80; C04B41/81; C04B41/85; H; H01; H01M; H01M4/00; H01M4/02; H01M4/06; H01M4/08; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1391211A
Cited
US286809A
Cited
US291526A
Cited
US375034A
Cited
US408358A
Cited
US270884A
Cited
US1055560A
Cited
US1126295A
Cited
US1285054A
Cited
US1434469A
Cited
US1874725A
Cited
US1997391A
Cited
US2178969A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |