US3077372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sodium hydroxide and chlorine for in situ hypochlorite formation in pretreatment of cotton in peroxidic bleaching
Assignee: Pennwalt Corp
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Filing: 1959-12-24
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Granted: 1963-02-12
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Expires: 1979-12-24
Abstract
No abstract record available.
Inventors
- 👤 Harry G Smolens
- 👤 Jr Oliver S Sprout
- 👤 Victor C Lane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:06
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/10; D06L4/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
THE PROCESS OF CONTINUOUSLY NEUTRALIZING RESIDUAL ALKALINITY IN COTTON CLOTH DERIVED FROM A CAUSTIC STAGE OF A HYDROGEN PEROXIDE BLEACHING PROCESS COMPRISING INTRODUCING THE CLOTH INTO AN AQUEOUS SOLUTION MAINTAINED AT A PH WITHIN THE RANGE OF 6.6 TO 10 AND WITH AN AVAILABLE CHLORINE CONCENTRATION OF 0.1 TO 5 GRAMS PER LITER BY THE INTRODUCTION OF CHLORINE WHILE MAINTAINING THE SAID SOLUTION AT A TEMPERATURE WITHIN THE RANGE OF 60 TO 120* F., RETAINING THE CLOTH WITHIN THE SAID SOLUTION FOR A PERIOD OF AT LEAST 3 SECONDS AND THEREAFTER INTRODUCING THE CLOTH INTO AQUEOUS HYDROGEN PEROXIDE.
Claim 2
Dependent Claim
98 words
THE PROCESS OF CONTINUOUSLY NEUTRALIZING RESIDUAL ALKALINITY IN COTTON CLOTH DERIVED FROM A CAUSTIC STAGE OF A HYDROGEN PEROXIDE BLEACHING PROCESS COMPRISING INTRODUCING THE CLOTH INTO AN AQUEOUS SOLUTION MAINTAINED AT A PH WITHIN THE RANGE OF 6.6 TO 10 AND WITH AN AVAILABLE CHLORINE CONCENTRATION OF 0.1 TO 5 GRAMS PER LITER BY THE INTRODUCTION OF CHLORINE WHILE MAINTAINING THE SAID SOLUTION AT A TEMPERATURE WITHIN THE RANGE OF 60 TO 120* F., RETAINING THE CLOTH WITHIN THE SAID SOLUTION FOR A PERIOD OF AT LEAST 3 SECONDS AND THEREAFTER INTRODUCING THE CLOTH INTO AQUEOUS HYDROGEN PEROXIDE.
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) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |