US3361677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making fluorescent precipitation pigments
Assignee: Lawter Chemicals Inc
•
Filing: 1964-05-18
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Granted: 1968-01-02
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Expires: 1984-05-18
Abstract
No abstract record available.
Inventors
- 👤 Robert W Voedisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:44
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/24; C08L; C08L61/00; C08L61/20; C08L61/22; C09; C09D; C09D5/00; C09D5/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN THE PREPARATION OF A FINE FLOCCULENT FLUORESCENT PIGMENT, THE STEPS OF DISSOLVING AN AMIDE ALDEHYDE- ARYL SULFONAMIDE RESIN AND A FLUORESCENT MATERIAL IN AN AQUEOUS ALKALINE SOLUTION, ADDING ACID TO THE SOLUTION WITH CONSTANT AGITATION TO REDUCE THE PH OF THE SOLUTION TO BELOW 7 WHEREBY THE RESIN AND FLUORESCENT MATERIAL PREIPITATES AS A FINE FLOCCULENT FLUORESCENT PIGMENT, AND THEN SEPARATING THE PRECIPITATED PIGMENT FROM THE LIQUID.
Claim 2
Dependent Claim
68 words
IN THE PREPARATION OF A FINE FLOCCULENT FLUORESCENT PIGMENT, THE STEPS OF DISSOLVING AN AMIDE ALDEHYDE- ARYL SULFONAMIDE RESIN AND A FLUORESCENT MATERIAL IN AN AQUEOUS ALKALINE SOLUTION, ADDING ACID TO THE SOLUTION WITH CONSTANT AGITATION TO REDUCE THE PH OF THE SOLUTION TO BELOW 7 WHEREBY THE RESIN AND FLUORESCENT MATERIAL PREIPITATES AS A FINE FLOCCULENT FLUORESCENT PIGMENT, AND THEN SEPARATING THE PRECIPITATED PIGMENT FROM THE LIQUID.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |