Patent US2751504A successfully refreshed from Google Patents.
US2751504A
Expired / Lapsed
US
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Support for image amplifiers
Assignee: Hartford National Bank and Trust Co
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Filing: 1952-05-01
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Granted: 1956-06-19
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Expires: 1972-05-01
Abstract
No abstract record available.
Inventors
- 👤 Boldingh Willem Hondius
- 👤 Hardenberg Jan Jesa Christiaan
- 👤 Oosterkamp Wybe Johannes
- 👤 Verhoeff Adrianus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:32
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/44; A61B6/4429; A61B6/4435; A61B6/4441; H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J2231/00; H01J2231/50; H01J2231/50005; H01J2231/5001; H01J2231/50031; H01J2231/50036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1933325A
Cited
US2103693A
Cited
US2319712A
Cited
US2546699A
Cited
US2555545A
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US2523132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-19 | 1959-12-19 | 1960-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-19 | 1963-12-19 | 1964-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-19 | 1967-12-19 | 1968-06-19 | $7700.00 | Window Closed / Lapsed |