US2603757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photocathode
Assignee: Individual
•
Filing: 1948-11-05
•
Granted: 1952-07-15
•
Expires: 1968-11-05
Abstract
No abstract record available.
Inventors
- 👤 Sheldon Edward Emanuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:13
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/34; C; C09; C09K; C09K11/00; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38; H01J29/385; H01J2201/00; H01J2201/34; H01J2201/342; H01J2201/3421; H01J2201/3425; H01J2201/3426
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2258436A
Cited
US2259372A
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US2200853A
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US2198479A
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US2297478A
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US2233786A
Cited
US2473220A
Cited
US2452523A
Cited
US2435436A
Cited
US2476619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |