US2528969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp
Assignee: MICHAEL REESE RES FOUNDATION
•
Filing: 1945-03-07
•
Granted: 1950-11-07
•
Expires: 1965-03-07
Abstract
No abstract record available.
Inventors
- 👤 Oppenheimer Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:25
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/70; H01J61/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2152987A
Cited
US2272486A
Cited
US2300892A
Cited
US2278844A
Cited
US2329125A
Cited
US2359057A
Cited
US2362385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |