US2929957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual picture direct view storage tube
Assignee: AT&T Inc
•
Filing: 1956-12-31
•
Granted: 1960-03-22
•
Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 William E Kirkpatrick
- 👤 Raymond W Sears
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:32
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/18; H01J29/00; H01J29/46
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2238137A
Cited
USRE22734E
Cited
US2276359A
Cited
US2618762A
Cited
US2556824A
Cited
US2532339A
Cited
US2761089A
Cited
US2857551A
Cited
US2790929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |