US2827484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonic acid bleaching process
Assignee: Honeywell International Inc
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Filing: 1956-02-17
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Granted: 1958-03-18
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Expires: 1976-02-17
Abstract
No abstract record available.
Inventors
- 👤 Emery J Carlson
- 👤 Henry R Nychka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:31
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/42; C07C303/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR BLEACHING A BENZENE SULFONIC ACID SUBSTITUTED WITH AN ALIPHATIC HYDROCARBON RADICAL CONTAINING UP TO ABOUT 23 CARBON ATOMS WHICH COMPRISES TREATING SAID ACID AT A TEMPERATURE OF ABOUT 20* TO 85*C. IN A BLEACHING MEDIUM CONSISTING OF HYDROGEN PEROXIDE AND AT LEAST ONE MEMBER OF THE GROUP OF DILUENTS CONSISTING OF WATER AND ALCOHOLS CONTAINING FROM 1 TO 3 CARBON ATOMS PER MOLECULE, THE AMOUNT OF HYDROGEN PEROXIDE BEING ABOUT 0.1% TO ABOUT 1.0% BY WEIGHT (100% BASIS) OF THE ACID AND THE AMOUNT OF DILUENT BEING AT LEAST ABOUT 8% BY WEIGHT OF THE ACID.
Claim 2
Dependent Claim
99 words
A PROCESS FOR BLEACHING A BENZENE SULFONIC ACID SUBSTITUTED WITH AN ALIPHATIC HYDROCARBON RADICAL CONTAINING UP TO ABOUT 23 CARBON ATOMS WHICH COMPRISES TREATING SAID ACID AT A TEMPERATURE OF ABOUT 20* TO 85*C. IN A BLEACHING MEDIUM CONSISTING OF HYDROGEN PEROXIDE AND AT LEAST ONE MEMBER OF THE GROUP OF DILUENTS CONSISTING OF WATER AND ALCOHOLS CONTAINING FROM 1 TO 3 CARBON ATOMS PER MOLECULE, THE AMOUNT OF HYDROGEN PEROXIDE BEING ABOUT 0.1% TO ABOUT 1.0% BY WEIGHT (100% BASIS) OF THE ACID AND THE AMOUNT OF DILUENT BEING AT LEAST ABOUT 8% BY WEIGHT OF THE ACID.
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) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |