US2806146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray beam columnator
Assignee: Individual
•
Filing: 1953-01-12
•
Granted: 1957-09-10
•
Expires: 1973-01-12
Abstract
No abstract record available.
Inventors
- 👤 John H Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:56
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/02; G21K1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1302353A
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US2212854A
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US2295975A
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US2455928A
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US2474421A
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US2614224A
Cited
US2556866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |