Patent US3533674A successfully refreshed from Google Patents.
US3533674A
Expired / Lapsed
US
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Holographic recording via three-level solid state laser material
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1968-03-27
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Granted: 1970-10-13
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Expires: 1988-03-27
Abstract
No abstract record available.
Inventors
- 👤 Robert E Brooks
- 👤 Lee O Heflinger
- 👤 Ralph F Wuerker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:48
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/11; H01S3/1123; H01S3/115; G; G03; G03H; G03H1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |