US2516282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heat-treating steel
Assignee: Carnegie Illinois Steel Corp
•
Filing: 1946-04-27
•
Granted: 1950-07-25
•
Expires: 1966-04-27
Abstract
No abstract record available.
Inventors
- 👤 Percy J Wilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:51
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/62; C21D1/667
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |