Patent US3711472A successfully refreshed from Google Patents.
US3711472A
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US
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Optical brightening agents
Assignee: Novartis AG
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Filing: 1970-08-28
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Granted: 1973-01-16
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Expires: 1990-08-28
Abstract
Abstract THE PRESENT INVENTION RELATES TO NEW COMPOUNDS OF THE FORMULA 2-B2,6-(B1-CH=CH-),B1-BENZOXAZOLE IN WHICH A1 REPRESENTS A HYDROGEN ATOM, A METHYL GROUP OR A HALOGEN ATOM, B1 DENOTES A RESIDUE OF THE SERIES PHENYL, DIPHENYL, 1-NAPHTHYL OR 2-NAPHTHYL AND B2 REPRESENTS A RESIDUE OF THE SERIES PHENYL, DIPHENYL, STYRYL, STILBENYL, P-PHENYL-STILBENYL, 1-NAPHTHYL OR 2-NAPHTHYL, AND IN WHICH TERMINAL PHENYL AND NAPHTHYL RESIDUES MAY CONTAIN ALKYL, LHALOGEN OR ALKOXY GROUPS. THESE NEW COMPOUNDS REPRESENT VALUABLE OPTICAL BRIGHTENING AGENTS.
Inventors
- 👤 E Maeder
- 👤 H Meyer
- 👤 A Siegrist
- 👤 P Liechti
- 👤 K Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:48
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/16; C07D215/00; C07D215/02; C07D215/04; C07D235/00; C07D235/02; C07D235/04; C07D235/18; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C07D241/00; C07D241/36; C07D241/38; C07D241/40; C07D241/42; C07D249/00; C07D249/02; C07D249/04; C07D249/06; C07D249/08; C07D249/16; C07D249/18; C07D249/20; C07D249/22; C07D249/24; C07D251/00; C07D251/02; C07D251/12; C07D251/14; C07D251/24; C07D253/00; C07D253/02; C07D253/06; C07D253/065; C07D263/00; C07D263/52; C07D263/54; C07D263/56; C07D263/57; C07D271/00; C07D271/02; C07D271/06; C07D271/10; C07D271/107; C07D277/00; C07D277/60; C07D277/62; C07D277/64; C07D277/66; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/12
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |