Patent US3822131A successfully refreshed from Google Patents.
US3822131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiographic elements and products
Assignee: Eastman Kodak Co
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Filing: 1972-08-31
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Granted: 1974-07-02
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Expires: 1992-08-31
Abstract
Abstract A RADIOGRAPHIC IMAGE-RECORDING ELEMENT COMPRISING AN ULTRAVIOLET ABSORBING MATERIAL, AN IMPROVED IMAGERECORDING PRODUCT COMPRISING SAID ELEMENT AND SUBSTANTIALLY ULTRAVIOLET EMITTING PHOSPHORS CONTAINING THICKLY COVERED INTERSIFYING SCREENS AND PROCESSES EMPLOYING SAID MATERIALS ARE DISCLOSED WHEREBY IMPROVED RADIOGRAPHIC CHARACTERISTICS ARE OBTAINED.
Inventors
- 👤 H Cleare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:32
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G21; G21K; G21K4/00
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |