US2900515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiography by gas ionization
Assignee: Individual
•
Filing: 1956-03-16
•
Granted: 1959-08-18
•
Expires: 1976-03-16
Abstract
No abstract record available.
Inventors
- 👤 Edward L Criscuolo
- 👤 Donald T O'connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:16
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/054; G03G15/0545; Y; Y10; Y10S; Y10S101/00; Y10S101/37; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2297691A
Cited
US2573881A
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US2692948A
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US2647464A
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US2802948A
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US2802949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |