US2810717A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorite bleaching in the presence of a nitrogen compound employed as a corrosion inhibitor
Assignee: Hercules Powder Co
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Filing: 1955-02-07
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Granted: 1957-10-22
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Expires: 1975-02-07
Abstract
No abstract record available.
Inventors
- 👤 Bayard T Lamborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:30
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; D; D06; D06L; D06L4/00; D06L4/20; D06L4/22; D06L4/24; D06L4/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
THE METHOD FOR BLEACHING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CELLULOSE AND CELLULOSE DERIVATIVES AND FOR INHIBITING CORROSION DURING SAID BLEACHING WHICH COMPRISES CONTACTING SAID MATERIAL WITH BETWEEN ABOUT 0.07% AND ABOUT 0.6% BY WEIGHT, BASED ON THE DRY WEIGHT OF SAID MATERIAL, OF A WATER-SOLUBLE INOGANIC CHLORITE AT AN ELEVATED TEMPERATURE BETWEEN ABOUT 70*C. AND ABOUT 150* C. IN A SUBSTANTIALY NEUTRAL SLURRYING MEDIUM CONTAINING BETWEEN ABOUT 0902% AND ABOUT 0.9% BY WEIGHT, BASED ON THE DRY WEIGHTR OF SAID MATERIAL, OF A NITROGEN COMPOUND, HAVING AT LEAST ONE HYDROGEN ATOM ATTACHED TO THE NITROGEN ATOM, AND SUBSTANTIALLY INERT TO SAID CHLORITE, WHICH HYDROLYZES AT LEAT SLIGHTLY IN SAID SLURRY MEDIUM TO RELEASE A VOLATILE BASIC NITROGEN COMPOUND OF THE GROUP CONSISTING OF AMMONIA AND AMMONIA DERIVATIVES FROM SAID SLURRYING MEDIUM AT SAID ELEVATED TEMPERATURE.
Claim 2
Independent Claim
138 words
THE METHOD FOR BLEACHING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CELLULOSE AND CELLULOSE DERIVATIVES AND FOR INHIBITING CORROSION DURING SAID BLEACHING WHICH COMPRISES CONTACTING SAID MATERIAL WITH BETWEEN ABOUT 0.07% AND ABOUT 0.6% BY WEIGHT, BASED ON THE DRY WEIGHT OF SAID MATERIAL, OF A WATER-SOLUBLE INOGANIC CHLORITE AT AN ELEVATED TEMPERATURE BETWEEN ABOUT 70*C. AND ABOUT 150* C. IN A SUBSTANTIALY NEUTRAL SLURRYING MEDIUM CONTAINING BETWEEN ABOUT 0902% AND ABOUT 0.9% BY WEIGHT, BASED ON THE DRY WEIGHTR OF SAID MATERIAL, OF A NITROGEN COMPOUND, HAVING AT LEAST ONE HYDROGEN ATOM ATTACHED TO THE NITROGEN ATOM, AND SUBSTANTIALLY INERT TO SAID CHLORITE, WHICH HYDROLYZES AT LEAT SLIGHTLY IN SAID SLURRY MEDIUM TO RELEASE A VOLATILE BASIC NITROGEN COMPOUND OF THE GROUP CONSISTING OF AMMONIA AND AMMONIA DERIVATIVES FROM SAID SLURRYING MEDIUM AT SAID ELEVATED TEMPERATURE.
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) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |