Patent US2195901A successfully refreshed from Google Patents.
Patent US3048700A successfully refreshed from Google Patents.
US3048700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray shutter apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1959-09-24
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Granted: 1962-08-07
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Expires: 1979-09-24
Abstract
No abstract record available.
Inventors
- 👤 Harry E Koerner
- 👤 Everett W Vaughn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:58
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/02; G21K1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1250730A
Cited
US1623567A
Cited
US1767756A
Cited
US2474422A
Cited
US2492031A
Cited
GB706378A
Cited
US2784320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-06 | 1966-02-05 | 1966-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-06 | 1970-02-05 | 1970-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-06 | 1974-02-05 | 1974-08-07 | $7700.00 | Window Closed / Lapsed |