US3728275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparations containing concentrated aqueous asymmetrically substituted bis-triazinylaminostilbenes and the use of the preparations for optical brightening
Assignee: Novartis Corp
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Filing: 1970-10-13
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Granted: 1973-04-17
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Expires: 1990-10-13
Abstract
Abstract MIXTURES OF NEW ASYMMETRICALLY SUBSTITUTED BIS-TRIAZINYLAMINOSTILBENES ARE OPTICAL BRIGHTENERS FOR ORGANIC MATERIALS. THE MIXTURES ARE PREPARED BY REACTING CYGANIC CHLORIDE WITH AN AMINOBENZENESULFONIC ACID, 4,4''-DIAMINOSTILBENE-2,2''-DISULFONIC ACID AND A MIXTURE OF A ISOMER MIXTURE OF DIMETHYLMORPHOLINESS AND DIETHANOLAMINE.
Inventors
- 👤 P Horlacher
- 👤 G Creutzburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:58
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/30; C; C11; C11D; C11D3/00; C11D3/40; C11D3/42; D06; D06L; D06L4/00; D06L4/60; D06L4/65
Claims Analysis
Total Claims: 0
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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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |