Patent US2224077A successfully refreshed from Google Patents.
US2224077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shutter for X-ray apparatus and the like
Assignee: KELLEY KOETT Manufacturing Co Inc
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Filing: 1939-12-18
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Granted: 1940-12-03
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Expires: 1959-12-18
Abstract
No abstract record available.
Inventors
- 👤 Walter H Haupt
- 👤 Haden S Ware
- 👤 Tietig Chester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:37
CPC Classifications
F; F21; F21V; F21V14/00; F21V14/08; G; G21; G21K; G21K1/00; G21K1/02; G21K1/04; H; H05; H05B; H05B31/00; H05B31/40; Y; Y10; Y10S; Y10S246/00; Y10S246/01
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) | 1943-12-03 | 1944-06-03 | 1944-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-03 | 1948-06-03 | 1948-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-03 | 1952-06-03 | 1952-12-03 | $7700.00 | Window Closed / Lapsed |