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US2641995A
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Assignee: United States Steel Corp
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Filing: 1950-06-29
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Granted: 1953-06-16
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Expires: 1970-06-29
Abstract
No abstract record available.
Inventors
- 👤 James E Whittaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:07
CPC Classifications
B; B44; B44B; B44B5/00; B44B5/0004; B44B5/0033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1652057A
Cited
US1652087A
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US1896548A
Cited
US2418165A
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US2418213A
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US2532540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |