US2669769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making core box vent plugs
Assignee: Individual
•
Filing: 1949-09-10
•
Granted: 1954-02-23
•
Expires: 1969-09-10
Abstract
No abstract record available.
Inventors
- 👤 Edwin F Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:28
CPC Classifications
B; B21; B21K; B21K23/00; B22; B22C; B22C7/00; B22C7/06; B22C7/065; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/4943; Y10T29/496
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1150249A
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US2147243A
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US2156692A
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US2376742A
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US2477607A
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US2482321A
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US2482330A
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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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |