Patent US2295915A successfully refreshed from Google Patents.
Patent US1291710A successfully refreshed from Google Patents.
Patent US2522306A successfully refreshed from Google Patents.
Patent US4042911A successfully refreshed from Google Patents.
Patent US3403260A successfully refreshed from Google Patents.
US3403260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural channel optical memory using color to discriminate among channels
Assignee: AT&T Inc
•
Filing: 1965-03-08
•
Granted: 1968-09-24
•
Expires: 1985-03-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Geusic
- 👤 John G Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:24
CPC Classifications
G; G11; G11C; G11C13/00; G11C13/04; G11C13/048
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE26170E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |