Patent US2556909A successfully refreshed from Google Patents.
US2556909A
Expired / Lapsed
US
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X-ray apparatus
Assignee: KELLEY KOETT Manufacturing CO
•
Filing: 1946-09-07
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Granted: 1951-06-12
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Expires: 1966-09-07
Abstract
No abstract record available.
Inventors
- 👤 Adolph H Feibel
- 👤 Elbert E Greenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:17
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)
US1628699A
Cited
US1877260A
Cited
US1823535A
Cited
US1973415A
Cited
US1987413A
Cited
US2360036A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |