US2463180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for making mosaic targets for electron beams
Assignee: AT&T Inc
•
Filing: 1943-04-29
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Granted: 1949-03-01
•
Expires: 1963-04-29
Abstract
No abstract record available.
Inventors
- 👤 John B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:34
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2103623A
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US2193101A
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US2239642A
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US2157478A
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US2178233A
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US2281638A
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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) | 1952-02-29 | 1952-08-30 | 1953-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-29 | 1956-08-30 | 1957-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-29 | 1960-08-30 | 1961-03-01 | $7700.00 | Window Closed / Lapsed |