Patent US1213872A successfully refreshed from Google Patents.
US1213872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System of x-ray-tube operation.
Assignee: Individual
•
Filing: 1914-04-13
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Granted: 1917-01-30
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Expires: 1934-04-13
Abstract
No abstract record available.
Inventors
- 👤 George R Hogan
- 👤 Hector P Mclagan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:48
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/02; H05G1/04; H05G1/06
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) | 1920-01-30 | 1920-07-31 | 1921-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-01-30 | 1924-07-31 | 1925-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-01-30 | 1928-07-31 | 1929-01-30 | $7700.00 | Window Closed / Lapsed |