US2491316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for metal sheet conveyers in tin-plating apparatus
Assignee: National Steel Corp
•
Filing: 1947-05-12
•
Granted: 1949-12-13
•
Expires: 1967-05-12
Abstract
No abstract record available.
Inventors
- 👤 Harry C Kirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:34
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US567262A
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US1077818A
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US1218988A
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US1809398A
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US2083936A
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US2338438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |