Patent US3351466A successfully refreshed from Google Patents.
US3351466A
Expired / Lapsed
US
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Radiographs viewable by reflected or transmitted light
Assignee: Polaroid Corp
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Filing: 1963-07-08
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Granted: 1967-11-07
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Expires: 1983-07-08
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Land
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:21
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/16; G03C5/17; G03C8/00; G03C8/42; G03C8/44; G21; G21K; G21K4/00; Y; Y10; Y10S; Y10S430/00; Y10S430/167
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
102 words
A PROCESS FOR PREPARING RADIOGRAPHS WHICH COMPRISES: (1) PROVIDING AN INTEGRAL FILM ASSEMBLY COMPRISING, IN ORDER, A TRANSPARENT SUPPORT, A TRANSLUCENT MATERIAL AND AN INTENSIFIER SCREEN IN A LAYER ABOVE SAID SUPPORT, AN IMAGE-RECEIVING LAYER ABOVE SAID INTENSIFIER SCREEN AND A PHOTOSENSITIVE SILVER HALIDE EMULSION LAYER ABOVE SAID IMAGE-RECEIVING LAYER; (2) EXPOSING SAID FILM ASSEMBLY THROUGH SAID SUPORT TO RADIOACTIVE RAYS; (3) DEVEOPING SAID EXPOSED EMULSION; AND (4) FORMING A POSITIVE SILVER IMAGE BY TRANSFERRING, BY IMBIBITION, AN IMAGEWISE DISTRIBUTION OF UNEXPOSED SILVER HALIDE TO SAID IMAGE-RECEIVING LAYER, THEREBY FORMING A POSITIVE RADIOGRAPH WHICH IS BOTH A REFLECTION PRINT AND A TRANSPARENCY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |