Patent US3045220A successfully refreshed from Google Patents.
US3045220A
Expired / Lapsed
US
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Magnetic modulator system
Assignee: IIT Research Institute
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Filing: 1957-12-11
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Granted: 1962-07-17
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Expires: 1977-12-11
Abstract
No abstract record available.
Inventors
- 👤 Marvin E Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:59
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/08; H03C1/10; G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/335
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2418553A
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US2722569A
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US2804506A
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US2822533A
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US2870270A
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US2901676A
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US2855466A
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US2918535A
Cited
US2875429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-16 | 1966-01-15 | 1966-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-16 | 1970-01-15 | 1970-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-16 | 1974-01-15 | 1974-07-17 | $7700.00 | Window Closed / Lapsed |