US2753763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron optical filter
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1952-12-31
•
Granted: 1956-07-10
•
Expires: 1972-12-31
Abstract
No abstract record available.
Inventors
- 👤 Jesse H Haines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:55
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/28; G02B27/288; G02F; G02F1/00; G02F1/01; G02F1/23; H; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1997371A
Cited
US2184999A
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US2350892A
Cited
US2531951A
Cited
US2493200A
Cited
US2586635A
Cited
US2616962A
Cited
US2527593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |