US2815551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for the casting of metal
Assignee: British Iron and Steel Research Association BISRA
•
Filing: 1955-06-21
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Granted: 1957-12-10
•
Expires: 1975-06-21
Abstract
No abstract record available.
Inventors
- 👤 Wilfrid C F Hessenberg
- 👤 Savage John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:16
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/04; B22D11/053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191203221A
Cited
US1088171A
Cited
DE674136C
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US2284704A
Cited
US2597046A
Cited
DE877940C
Cited
DE902433C
Cited
GB718644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |