US2944872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for bleaching testile materials pregnated with sodium chlorite
Assignee: H P Gelderman & Zonen N V
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Filing: 1958-03-03
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Granted: 1960-07-12
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Expires: 1978-03-03
Abstract
No abstract record available.
Inventors
- 👤 Hendrikus C Vermijs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:15
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/20; D06L4/22; D06L4/24; D06L4/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN A BLEACHING PROCESS, WHEREIN A TEXTILE MATERIAL IMPREGNATED WITH A SODIUM CHLORITE SOLUTION HAVING A PH BETWEEN 4 AND 7 IS TREATED IN A CLOSE REACTION CHAMBER HEATED WITH STEAM TO A TEMPERATURE OF 140 TO 212*F., THE METHOD OF NEUTRALIZING THE CHLORINE DIOXIDE VAPORS DEVELOPED FROM THE IMPREGNATED MATERIAL COMPRISING THE STEP OF INTRODUCING A VOLATILE REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF HYDROGEN SULFIDE AND FORMALDEHYDE INTO SAID REACTION CHAMBER.
Claim 2
Dependent Claim
74 words
IN A BLEACHING PROCESS, WHEREIN A TEXTILE MATERIAL IMPREGNATED WITH A SODIUM CHLORITE SOLUTION HAVING A PH BETWEEN 4 AND 7 IS TREATED IN A CLOSE REACTION CHAMBER HEATED WITH STEAM TO A TEMPERATURE OF 140 TO 212*F., THE METHOD OF NEUTRALIZING THE CHLORINE DIOXIDE VAPORS DEVELOPED FROM THE IMPREGNATED MATERIAL COMPRISING THE STEP OF INTRODUCING A VOLATILE REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF HYDROGEN SULFIDE AND FORMALDEHYDE INTO SAID REACTION CHAMBER.
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |