US3804774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inks which fluoresce when exposed to near or middle ultraviolet radiation
Assignee: Horizons Inc
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Filing: 1972-08-03
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Granted: 1974-04-16
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Expires: 1992-08-03
Abstract
Abstract BLUE INKS WHICH, WHEN DRY, FLUORESCE WITH VERY SHORT LUMINESCENT LIFETIMES WHEN EXPOSED TO NEAR U.V. OR MIDDLE U.V. COMPRISE SUITABLE POLYMERS IN WHICH CERTAIN ANTHRACENES ARE DISSOLVED OR DISPERSED.
Inventors
- 👤 J Betts
- 👤 R Fotland
- 👤 V Petro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:03
CPC Classifications
C; C09; C09D; C09D11/00
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) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |