US3401048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-styrylazole optical brightener
Assignee: Mitsui Chemical Industry Co Ltd
•
Filing: 1965-06-18
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Granted: 1968-09-10
•
Expires: 1985-06-18
Abstract
No abstract record available.
Inventors
- 👤 Okubo Ichiro
- 👤 Tsujimoto Michihiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:44
CPC Classifications
C; C07; C07D; C07D413/00; C07D413/14; C07D413/02; C07D413/10; C07D417/00; C07D417/02; C07D417/10; C07D417/14; C11; C11D; C11D1/00; D; D06; D06L; D06L4/00; D06L4/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A PROCESS FOR THE OPTICAL BRIGHTENING OF ORGANIC FIBROUS MATERIAL WHICH COMPRISES CONTACTING THE ORGANIC FIBROUS MATERIAL, IN AN AQUEOUS DISPERSION SYSTEM, WITH AT LEAST ONE OF THE 2-STYRYLOXAZOLE COMPOUNDS REPRESENTED BY THE GENERAL FORMULA
Claim 2
Dependent Claim
35 words
A PROCESS FOR THE OPTICAL BRIGHTENING OF ORGANIC FIBROUS MATERIAL WHICH COMPRISES CONTACTING THE ORGANIC FIBROUS MATERIAL, IN AN AQUEOUS DISPERSION SYSTEM, WITH AT LEAST ONE OF THE 2-STYRYLOXAZOLE COMPOUNDS REPRESENTED BY THE GENERAL FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |