US2674941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary marking device
Assignee: Bethlehem Steel Corp
•
Filing: 1947-09-20
•
Granted: 1954-04-13
•
Expires: 1967-09-20
Abstract
No abstract record available.
Inventors
- 👤 Charles E Hopwood
- 👤 Robert L Winkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:27
CPC Classifications
B; B21; B21C; B21C51/00; B21C51/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US423394A
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US887730A
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US978839A
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US1164730A
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US1945625A
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US2138142A
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US2173875A
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US2253158A
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US2284094A
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US2330359A
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US2358674A
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US2426564A
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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) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |