US2503819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous casting
Assignee: Dow Chemical Co
•
Filing: 1945-12-08
•
Granted: 1950-04-11
•
Expires: 1965-12-08
Abstract
No abstract record available.
Inventors
- 👤 George F Gunn
- 👤 Clarence E Logan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:16
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/10; B22D11/11; B22D11/114
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |