US3687803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid chloride activators for hydrogen peroxide bleaching
Assignee: Wyeth Holdings LLC
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Filing: 1970-11-09
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Granted: 1972-08-29
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Expires: 1990-11-09
Abstract
Abstract AN OXYGEN BLEACHING COMPOSITION COMPRISING AN OXYGEN BLEACH, SUCH AS HYDROGEN PEROXIDE, AND AN ACTIVATOR, SUCH AS BENZOYL CHLORIDE, USEFUL IN THE BLEACHING OF TEXTILES AND FIBROUS CELLULOSIC MATERIALS SUCH AS WOOD PULP AND STRAW. AN IMPROVED PROCESS FOR THE OXYGEN BLEACHING OF TEXTILES AND WOOD PULP IS ALSO DESCRIBED.
Inventors
- 👤 Martin Grayson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:37
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/10; D21C9/1026; D21C9/1036; D06; D06L; D06L4/00; D06L4/10; D06L4/12
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |