US3390989A
Expired / Lapsed
US
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Methods of imaging a data storage medium
Assignee: Northrop Grumman Guidance and Electronics Co Inc
•
Filing: 1964-04-15
•
Granted: 1968-07-02
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Expires: 1984-04-15
Abstract
No abstract record available.
Inventors
- 👤 Berman Elliot
- 👤 Carl F W Ekman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:58
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/58; G03B; G03B17/00; G03B17/48; G03B17/50; G03D; G03D3/00; G03D3/08; G03D3/12; G03G; G03G15/00; G03G15/22; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G06; G06K; G06K1/00; G06K1/12; G06K1/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2051603A
Cited
US2750292A
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US2990280A
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US3152903A
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US3279095A
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US3284224A
Cited
US3331276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |