US3560211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light sensitive leuco dye systems containing no molecular oxygen therein
Assignee: Horizons Research Inc
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Filing: 1967-09-22
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Granted: 1971-02-02
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Expires: 1987-09-22
Abstract
Abstract COMPOSITIONS CONSISTING ESSENTIALLY OF A MIXTURE OF (1) AT LEAST ONE LEUCO DYE BASE AND (2) AN ORGANIC OR INORGANIC IODIDE, CHLORIDE OR BROMIDE, PREFERABLY DISPERSED OR DISSOLVED IN A SYNTHETIC POLYMER, E.G. AS A FILM, EXHIBIT SENSITIVITY TO HIGH ENERGY RADIATION, I.E., RADIATION HAVING WAVELENGTHS SHORTER THAN 400 MILLIMICRONS. SUBJECTING THE COMPOSITION (FILM) TO AN OXYGEN FREE ATMOSPHERE PREFERABLY UNDER CONDITIONS SUCH THAT MOLECULAR OXYGEN PRESENT IN THE COMPOSITION IS REMOVED FROM THE COMPOSITION IS FOUND TO MARKEDLY INCREASE THE SENSITIVITY OF THE SAME, WHEN THE TREATMENT IS EFFECTED PRIOR TO OR DURING EXPOSURE TO THE HIGH ENERGY RADIATION.
Inventors
- 👤 Richard A Fotland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:32
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/675; G03C1/72; G03C1/73; G03C1/732
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |