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Patent US3547509A successfully refreshed from Google Patents.
US3547509A
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Holographic recording media
Assignee: AT&T Inc
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Filing: 1967-08-04
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Granted: 1970-12-15
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Expires: 1987-08-04
Abstract
No abstract record available.
Inventors
- 👤 Raymond G Brandes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:20
CPC Classifications
G; G11; G11C; G11C13/00; G11C13/04; G11C13/042; G11C13/046; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03H; G03H1/00; G03H1/02; G03H1/22; G03H1/2294; G03H1/0005; G03H2001/0088; G03H2001/026; G03H2001/0264; G03H1/04; G03H1/0476; G03H2001/0484; G03H2260/00; G03H2260/30; G03H2260/35; G03H2260/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3407145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |