Patent US3640889A successfully refreshed from Google Patents.
US3640889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent skin-marking composition
Assignee: Mautz Paint and Varnish Co
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Filing: 1969-04-28
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Granted: 1972-02-08
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Expires: 1989-04-28
Abstract
Abstract A NORMALLY LIQUID, ULTRAVIOLET LIGHT-SENSITIVE SKIN MARKING COMPOSITION IS DISCLOSED AS BEING USEFUL FOR MARKING THE SKIN OF ANIMALS OR HUMANS, FOR INSTANCE TO INDICATE AREAS ON A PATIENT''S SKIN WHICH ARE TO BE SUBJECTED TO RADIATION THERAPY, FOR EXAMPLE FOR THE TREATMENT OF CANCER. THE MARK LEFT BY THE COMPOSITION IS INVISIBLE IN VISIBLE LIGHT BUT FLUORESCES UNDER ULTRAVIOLET LIGHT. THE COMPOSITION CONSISTS ESSENTIALLY OF POLYVINYL ACETATE, A WATER-IMMISCIBLE FLUORESCENT BRIGHTENING AGENT OF THE AMINOCOUMARIN TYPE, ORGANIC SOLVENT, AND, OPTIONALLY, WATER.
Inventors
- 👤 Dair J Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:24
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |