Patent US2993745A successfully refreshed from Google Patents.
US2993745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and compositions for bleaching in acid solutions
Assignee: Mangels Herold Co Inc
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Filing: 1956-07-27
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Granted: 1961-07-25
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Expires: 1976-07-27
Abstract
No abstract record available.
Inventors
- 👤 Rowell R Dorsett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:14
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/20; D06L4/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
THE METHOD OF BLEACHING FIBERS AND FILAMENTS OF NYLON, CELLULOSE, REGENERATED CELLULOSE, AND POLYESTERS WHICH CONSISTS OF PREPARING AN AQUEOUS SOLUTION OF AN ACTIVE BLEACHING AGENT OF THE GROUP CONSISTING OF TRICHLOROCYANURIC ACID AND DICHLOROCYANURIC ACID IN AMOUNT SUFFICIENT TO PROVIDE ABOUT 1% TO ABOUT 25% OF AVAILABLE CHLORINE, AND A DEGRADATION INHIBITING AGENT SELECTED FROM THE CLASS OF PHOSPHATE CONSISTING OF ALKALI METAL MOLECULARLY DEHYDRATED PHOSPHATE GLASS, ALKALI METAL TRIPOLYPHOSPHATE AND ALKALI METAL PYROPHOSPHATE, INCLUDING ALKALI METAL ACID PYROPHOSPHATE, ADJUSTING THE PH OF THE SOLUTION TO A VALUE FROM ABOUT PH 4 TO 6.9, SOAKING THE MATERIALS TO BE BLEACHED IN THE SOLUTION, RINSING, AND REMOVING THE MATERIALS FROM THE BLEACH AND DRYING THE SAME.
Claim 2
Independent Claim
116 words
THE METHOD OF BLEACHING FIBERS AND FILAMENTS OF NYLON, CELLULOSE, REGENERATED CELLULOSE, AND POLYESTERS WHICH CONSISTS OF PREPARING AN AQUEOUS SOLUTION OF AN ACTIVE BLEACHING AGENT OF THE GROUP CONSISTING OF TRICHLOROCYANURIC ACID AND DICHLOROCYANURIC ACID IN AMOUNT SUFFICIENT TO PROVIDE ABOUT 1% TO ABOUT 25% OF AVAILABLE CHLORINE, AND A DEGRADATION INHIBITING AGENT SELECTED FROM THE CLASS OF PHOSPHATE CONSISTING OF ALKALI METAL MOLECULARLY DEHYDRATED PHOSPHATE GLASS, ALKALI METAL TRIPOLYPHOSPHATE AND ALKALI METAL PYROPHOSPHATE, INCLUDING ALKALI METAL ACID PYROPHOSPHATE, ADJUSTING THE PH OF THE SOLUTION TO A VALUE FROM ABOUT PH 4 TO 6.9, SOAKING THE MATERIALS TO BE BLEACHED IN THE SOLUTION, RINSING, AND REMOVING THE MATERIALS FROM THE BLEACH AND DRYING THE SAME.
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) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |