US2553197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric tube
Assignee: Hartford National Bank and Trust Co
•
Filing: 1946-05-09
•
Granted: 1951-05-15
•
Expires: 1966-05-09
Abstract
No abstract record available.
Inventors
- 👤 Lems Hendrik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:24
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1133435A
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US1596758A
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US1724872A
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US1851706A
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US2015520A
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US1980198A
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US2151785A
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US2198227A
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US2367816A
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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) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |