US2568428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold with riser and exothermic insert
Assignee: Individual
•
Filing: 1949-09-09
•
Granted: 1951-09-18
•
Expires: 1969-09-09
Abstract
No abstract record available.
Inventors
- 👤 Irvin A Billiar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:16
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/08; B22C9/088; B22D; B22D27/00; B22D27/09; B22D27/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US362337A
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US464441A
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US770130A
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US1019965A
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GB446329A
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DE664540C
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US2439450A
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US2406333A
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GB595795A
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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) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |