US2603669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Large electrode with thermal stress relief
Assignee: Union Carbide Corp
•
Filing: 1948-10-26
•
Granted: 1952-07-15
•
Expires: 1968-10-26
Abstract
No abstract record available.
Inventors
- 👤 Charles H Chappell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:32
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/06; H05B7/08; H05B7/085
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US584867A
Cited
US1313126A
Cited
US1115027A
Cited
US1065141A
Cited
US1058057A
Cited
GB191206986A
Cited
GB191206984A
Cited
DE456341C
Cited
US2527294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |