US3741907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent pigments having an isocyanate resin base
Assignee: Giegle G and Co GmbH
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Filing: 1971-03-16
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Granted: 1973-06-26
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Expires: 1991-03-16
Abstract
Abstract BRITTLE RESINS SUITABLE AS BASES FOR FLUORESCENT PIGMENTS ARE PREPARED FROM DIISOCYANATES BY POLYADDITION REACTIONS WITH SULFONAMIDES AND/OR POLYOLS. THE COLORING MATTER MAY BE DISPERSED IN THE POLYMERIZATION MIXTURE OF THE COMMINUTED RESINS MAY BE DYED IN AN ACID DYE BATH. THE RESINS ARE READILY PULVERIZED, RESIST ELEVATED TEMPERATURES WITHOUT SOFTENING OR DECOMPOSING, AND ARE INSOLUBLE OR PARACTICALLY INSOLUBLE IN THE SOLVENTS USUALLY EMPLOYED IN MAKING ORGANIC COATING COMPOSITIONS AND INKS.
Inventors
- 👤 H Beyerlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/28; C08G18/30; C08G18/32; C08G18/3203; C08G18/38; C08G18/3855; C08G18/3857; C08G18/3861; C08G18/73; C08K; C08K5/00; C08K5/0008; C08K5/0041
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |