US2837800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting of ferrous ingots
Assignee: Yawata Iron and Steel Co Ltd
•
Filing: 1955-10-21
•
Granted: 1958-06-10
•
Expires: 1975-10-21
Abstract
No abstract record available.
Inventors
- 👤 Hachiya Shigeo
- 👤 Uchiyama Tatsuhei
- 👤 Aihara Masumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:55
CPC Classifications
B; B22; B22D; B22D27/00; B22D27/20; C; C21; C21C; C21C7/00; C21C7/04; C21C7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1672446A
Cited
GB190322294A
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US1053738A
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US1206188A
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US1184523A
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US1596888A
Cited
US1673873A
Cited
US1814584A
Cited
GB502756A
Cited
GB581888A
Cited
US2591517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |