US2926239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite image forming apparatus for visible and invisible electromagnetic waves
Assignee: AT&T Inc
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Filing: 1944-09-18
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Granted: 1960-02-23
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Expires: 1964-09-18
Abstract
No abstract record available.
Inventors
- 👤 Albert M Skellett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:11
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; G; G02; G02B; G02B23/00; G02B23/12; H01J2231/00; H01J2231/50; H01J2231/50005; H01J2231/5001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190327572A
Cited
US1517332A
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GB193969A
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US1605016A
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US1959264A
Cited
GB373290A
Cited
US2155471A
Cited
US1954755A
Cited
US1948552A
Cited
US1979159A
Cited
US1990494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |