Patent US2222549A successfully refreshed from Google Patents.
US2222549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray tube
Assignee: Hartford National Bank and Trust Co
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Filing: 1938-12-17
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Granted: 1940-11-19
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Expires: 1958-12-17
Abstract
No abstract record available.
Inventors
- 👤 Verhoeff Adrianus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:53
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/101; H01J2235/00; H01J2235/12; H01J2235/1225; H01J2235/1262; H01J2235/1266
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-11-19 | 1944-05-20 | 1944-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-19 | 1948-05-20 | 1948-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-19 | 1952-05-20 | 1952-11-19 | $7700.00 | Window Closed / Lapsed |