US3343906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose bleaching process using peroxide solution containing an alkali metal carbonate and bicarbonate
Assignee: Pennwalt Corp
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Filing: 1964-06-23
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Granted: 1967-09-26
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Expires: 1984-06-23
Abstract
No abstract record available.
Inventors
- 👤 Harry G Smolens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:08
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/10; D06L4/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE PROCESS OF BLEACHING TEXTILE MATERIAL CONTAINING NAPHTHOL DYED YARN BY WETTING THE MATERIALS WITH AN AQUEOUS BLEACHING SOLUTION COMPRISING: WATER 2.0 TO 50 GRAMS PER LITER OF 100% HYDROGEN PEROXIDE, 2.0 TO 50 GRAMS PER LITER OF ALKALI METAL BICARBONATE, AND A SUFFICIENT QUANTITY OF ALKALI METAL CARBONATE TO CAUSE THE SOLUTION TO HAVE A PH BETWEEN 9.5 AND 9.9 AND AN ALKALINITY FROM 0.05 TO 1.0 NORMAL.
Claim 2
Dependent Claim
69 words
THE PROCESS OF BLEACHING TEXTILE MATERIAL CONTAINING NAPHTHOL DYED YARN BY WETTING THE MATERIALS WITH AN AQUEOUS BLEACHING SOLUTION COMPRISING: WATER 2.0 TO 50 GRAMS PER LITER OF 100% HYDROGEN PEROXIDE, 2.0 TO 50 GRAMS PER LITER OF ALKALI METAL BICARBONATE, AND A SUFFICIENT QUANTITY OF ALKALI METAL CARBONATE TO CAUSE THE SOLUTION TO HAVE A PH BETWEEN 9.5 AND 9.9 AND AN ALKALINITY FROM 0.05 TO 1.0 NORMAL.
References Cited (Backward Citations)
US3280039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |