Patent US2460201A successfully refreshed from Google Patents.
US2460201A
Expired / Lapsed
US
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Laminated envelope structure for electron discharge devices
Assignee: Research Corp
•
Filing: 1946-12-20
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Granted: 1949-01-25
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Expires: 1966-12-20
Abstract
No abstract record available.
Inventors
- 👤 John G Trump
- 👤 Robert W Cloud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:16
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/36; C; C03; C03C; C03C27/00; C03C27/06; C03C27/10; H01J5/00; H01J5/02; H01J5/06
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) | 1952-01-25 | 1952-07-26 | 1953-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-25 | 1956-07-26 | 1957-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-25 | 1960-07-26 | 1961-01-25 | $7700.00 | Window Closed / Lapsed |