Patent US1543774A successfully refreshed from Google Patents.
US1543774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of metal wheels
Assignee: Bethlehem Steel Corp
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Filing: 1921-01-17
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Granted: 1925-06-30
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Expires: 1941-01-17
Abstract
No abstract record available.
Inventors
- 👤 Ibach Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:31
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/26; B21D53/268; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49481; Y10T29/49492; Y10T29/49513; Y10T29/4952
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) | 1928-06-29 | 1928-12-29 | 1929-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-06-29 | 1932-12-29 | 1933-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-06-29 | 1936-12-29 | 1937-06-30 | $7700.00 | Window Closed / Lapsed |