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US3452331A
Expired / Lapsed
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Photo-optical data storage systems
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1965-05-19
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Granted: 1969-06-24
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Expires: 1985-05-19
Abstract
No abstract record available.
Inventors
- 👤 Richard F Bartlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:42
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/2407; G11B7/24085; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G11B27/00; G11B27/36; G11C; G11C13/00; G11C13/04; G11C13/048
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3131628A
Cited
US3148355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |