Patent US2416720A successfully refreshed from Google Patents.
US2416720A
Expired / Lapsed
US
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Electrooptical device
Assignee: AT&T Inc
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Filing: 1943-01-30
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Granted: 1947-03-04
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Expires: 1963-01-30
Abstract
No abstract record available.
Inventors
- 👤 Gordon K Teal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:37
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/45; H01J29/395; H01J31/00; H01J31/08; H01J31/26; H01J31/28; H01J31/40; H01J9/00; H01J9/20; H01J9/233
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US817608A
Cited
US2045984A
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US2141375A
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US2120765A
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US2163266A
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US2264152A
Cited
US2338234A
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US2373395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-03 | 1950-09-02 | 1951-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-03 | 1954-09-02 | 1955-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-03 | 1958-09-02 | 1959-03-04 | $7700.00 | Window Closed / Lapsed |