US3444416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron emitting device and method of assembling the same
Assignee: Sony Corp
•
Filing: 1967-09-06
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Granted: 1969-05-13
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Expires: 1987-09-06
Abstract
No abstract record available.
Inventors
- 👤 Susumu Yoshida
- 👤 Takamitsu Tsuboi
- 👤 Kiichi Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:54
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/04; H01J29/46; H01J29/48; H01J29/485; H01J3/00; H01J3/02; H01J3/027; H01J9/00; H01J9/02; H01J9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |