US1268685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric-resistance furnace.
Assignee: General Electric Co
•
Filing: 1916-12-16
•
Granted: 1918-06-04
•
Expires: 1936-12-16
Abstract
No abstract record available.
Inventors
- 👤 William D Coolidge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:44
CPC Classifications
B; B23; B23K; B23K3/00; B23K3/06; B23K3/0607
Claims Analysis
Total Claims: 0
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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) | 1921-06-03 | 1921-12-03 | 1922-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-06-03 | 1925-12-03 | 1926-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-06-03 | 1929-12-03 | 1930-06-04 | $7700.00 | Window Closed / Lapsed |