Patent US2455997A successfully refreshed from Google Patents.
US2455997A
Expired / Lapsed
US
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Current regulating system
Assignee: Carnegie Illinois Steel Corp
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Filing: 1944-01-24
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Granted: 1948-12-14
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Expires: 1964-01-24
Abstract
No abstract record available.
Inventors
- 👤 Robert W Holman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:01
CPC Classifications
C; C25; C25D; C25D21/00; C25D21/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1680806A
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US1710755A
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US1776151A
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US1921703A
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US1994324A
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US2137043A
Cited
US2325401A
Cited
US2332042A
Cited
US2404948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |