Patent US3561990A successfully refreshed from Google Patents.
US3561990A
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Fluorescent ink and method for making materials fluoresce
Assignee: Beazer East Inc
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Filing: 1968-05-08
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Granted: 1971-02-09
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Expires: 1988-05-08
Abstract
Abstract SUBSTRATES ARE MADE TO EXHIBIT FLUORESCENCE UPON EXPOSURE TO ULTRAVIOLET LIGHT THROUGH MODIFICATION OF THE SURFACE OF THE SUBSTRATE BY APPLICATION OF A MIXTURE OF SPECIFIC PHENYLSULFONYL CINNAMIC TYPE COMPOUNDS AND A SUITABLE CARRIER.
Inventors
- 👤 Hans Dressler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:06
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/87; C07D317/00; C07D317/08; C07D317/44; C07D317/46; C07D317/48; C07D317/50; C07D317/60; C09; C09D; C09D11/00; C09D5/00; C09D5/22; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/2481; Y10T428/24934; Y10T442/00; Y10T442/20; Y10T442/2582
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |