US2960383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous process for rapidly bleaching woven cotton fabric
Assignee: EIDP Inc
•
Filing: 1958-07-25
•
Granted: 1960-11-15
•
Expires: 1978-07-25
Abstract
No abstract record available.
Inventors
- 👤 Howard L Potter
- 👤 Hugh D Terhune
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; D06L4/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN A CONTINUOUS PROCESS FOR RAPIDLY BLEACHING WOVEN COTTON FABRIC WHICH COMPRISES SATURATING SAID FABRIC WITH AN AQUEOUS SCOURING SOLUTION CONTAINING BY WEIGHT 2.56% SODIUM HYDROXIDE, AND 0.5-1% OF A MOLECULARLY DEHYDRATED SALT OF PHOSPHORIC ACID,MAINTAINING THE TEMPERATURE OF SAID FABRIC AT 200-212*F. FOR 2-10 MINUTES, RINSING SAID FABRIC, SATURATING SAID FABRIC WITH AN AQUEOUS BLEACHING SOLUTION CONTAINING BY WEIGHT 0-0.6% SODIUM HYDROXIDE, 1-3% SODIUM SILICATE AND 0.5-1.2% H2O2, STORING SAID FABRIC FOR 2-10 MINUTES AT 200-212* F. AND THEREAFTER RINSING SAID FABRIC.
Claim 2
Dependent Claim
83 words
IN A CONTINUOUS PROCESS FOR RAPIDLY BLEACHING WOVEN COTTON FABRIC WHICH COMPRISES SATURATING SAID FABRIC WITH AN AQUEOUS SCOURING SOLUTION CONTAINING BY WEIGHT 2.56% SODIUM HYDROXIDE, AND 0.5-1% OF A MOLECULARLY DEHYDRATED SALT OF PHOSPHORIC ACID,MAINTAINING THE TEMPERATURE OF SAID FABRIC AT 200-212*F. FOR 2-10 MINUTES, RINSING SAID FABRIC, SATURATING SAID FABRIC WITH AN AQUEOUS BLEACHING SOLUTION CONTAINING BY WEIGHT 0-0.6% SODIUM HYDROXIDE, 1-3% SODIUM SILICATE AND 0.5-1.2% H2O2, STORING SAID FABRIC FOR 2-10 MINUTES AT 200-212* F. AND THEREAFTER RINSING SAID FABRIC.
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) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |