US2721287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple beam gun
Assignee: RCA Corp
•
Filing: 1951-09-26
•
Granted: 1955-10-18
•
Expires: 1971-09-26
Abstract
No abstract record available.
Inventors
- 👤 David D Van Ormer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:15
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/20; H01J29/00; H01J29/46; H01J29/48; H01J29/50; H01J29/70; H01J29/701; H01J29/702; H01J29/703
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2035623A
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DE704803C
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US1979392A
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CH169756A
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US2163256A
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US2122095A
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US2490308A
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US2457175A
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US2547415A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |