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US2423341A
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US
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Blowhole plug for sand boxes or containers
Assignee: Individual
•
Filing: 1945-10-03
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Granted: 1947-07-01
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Expires: 1965-10-03
Abstract
No abstract record available.
Inventors
- 👤 Axel H Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:47
CPC Classifications
B; B22; B22C; B22C15/00; B22C15/23; B22C15/24; B22C15/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US875228A
Cited
US1030326A
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US1905357A
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DE537473C
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US1950632A
Cited
US2049732A
Cited
DE643165C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-30 | 1950-12-30 | 1951-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-30 | 1954-12-30 | 1955-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-30 | 1958-12-30 | 1959-07-01 | $7700.00 | Window Closed / Lapsed |