US3530442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hologram memory
Assignee: AT&T Inc
•
Filing: 1968-10-09
•
Granted: 1970-09-22
•
Expires: 1988-10-09
Abstract
No abstract record available.
Inventors
- 👤 Robert J Collier
- 👤 Lawrence H Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:27
CPC Classifications
G; G11; G11C; G11C13/00; G11C13/04; G11C13/042; G11C13/046; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/1313; G03; G03H; G03H1/00; G03H1/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2982176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |