US2923853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge device
Assignee: Digital Technology Inc
•
Filing: 1955-07-12
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Granted: 1960-02-02
•
Expires: 1975-07-12
Abstract
No abstract record available.
Inventors
- 👤 Douglas C Engelbart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:27
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/24; G; G11; G11C; G11C19/00; G11C19/20; G11C19/207; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J65/00; H01J65/04; H01J65/042; H01J65/048; H01J2893/00; H01J2893/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2443407A
Cited
US2598677A
Cited
US2651004A
Cited
US2607015A
Cited
US2651741A
Cited
US2700146A
Cited
US2714179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |