Patent US2401049A successfully refreshed from Google Patents.
US2709221A
Expired / Lapsed
US
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X-ray apparatus
Assignee: KELEKET X RAY CORP
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Filing: 1952-09-19
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Granted: 1955-05-24
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Expires: 1972-09-19
Abstract
No abstract record available.
Inventors
- 👤 Walter H Haupt
- 👤 Paul F Schepker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:16
CPC Classifications
G; G03; G03B; G03B42/00; G03B42/02; G03B42/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2552858A
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US2026907A
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US2184962A
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US2327603A
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US2332044A
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US2468381A
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US2668913A
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US2567566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |