Patent US1945395A successfully refreshed from Google Patents.
US3399072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic materials
Assignee: Boeing North American Inc
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Filing: 1967-04-14
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Granted: 1968-08-27
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Expires: 1987-04-14
Abstract
No abstract record available.
Inventors
- 👤 George R Pulliam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:55
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/14; H01F41/22; C; C30; C30B; C30B29/00; C30B29/10; C30B29/16; C30B33/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2848310A
Cited
US2842468A
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US2919207A
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US3102099A
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US3094395A
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US3047438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |