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US3429359A
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Method and apparatus for blowing cores using microwave energy
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1965-05-21
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Granted: 1969-02-25
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Expires: 1985-05-21
Abstract
No abstract record available.
Inventors
- 👤 Ashley James Hollingsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:49
CPC Classifications
B; B22; B22C; B22C7/00; B22C7/06; B22C23/00; B22C9/00; B22C9/12; B60; B60C; B60C9/00; B60C9/0042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2083022A
Cited
US2517902A
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US2852818A
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US2793970A
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US3022814A
Cited
DE1189238B
Cited
US3296405A
Cited
US3259947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |