US2509766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color film for normally invisible radiations
Assignee: GAF Chemicals Corp
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Filing: 1947-01-24
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Granted: 1950-05-30
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Expires: 1967-01-24
Abstract
No abstract record available.
Inventors
- 👤 Siegfried T Gross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:36
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A MULTI-LAYER X-RAY FILM COMPRISING A PLURALITY OF SUPERIMPOSED SILVER HALIDE EMULSION LAYERS, ONE LAYER BEING SELECTIVELY SENSITIZED TO ABSORB X-RAYS OF A PREDETERMINED WAVE LENGTH AND TO TRANSMIT THE REMAINING X-RAYS AND THE OTHER LAYER BEING SELECTIVELY SENSITIZED TO ABSORB X-RAY WAVE LENGTHS TRANSMITTED BY THE FIRST LAYER, EACH LAYER HAVING A COLOR-FORMING COMPONENT CAPABLE UPON DEVELOPMENT OF YIELDING DIFFERENTLY COLORED SUBTRACTIVE DYESTUFF IMAGES.
Claim 2
Dependent Claim
65 words
A MULTI-LAYER X-RAY FILM COMPRISING A PLURALITY OF SUPERIMPOSED SILVER HALIDE EMULSION LAYERS, ONE LAYER BEING SELECTIVELY SENSITIZED TO ABSORB X-RAYS OF A PREDETERMINED WAVE LENGTH AND TO TRANSMIT THE REMAINING X-RAYS AND THE OTHER LAYER BEING SELECTIVELY SENSITIZED TO ABSORB X-RAY WAVE LENGTHS TRANSMITTED BY THE FIRST LAYER, EACH LAYER HAVING A COLOR-FORMING COMPONENT CAPABLE UPON DEVELOPMENT OF YIELDING DIFFERENTLY COLORED SUBTRACTIVE DYESTUFF IMAGES.
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) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |