US2839353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed peroxide textile bleaching process
Assignee: EIDP Inc
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Filing: 1956-04-26
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Granted: 1958-06-17
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Expires: 1976-04-26
Abstract
No abstract record available.
Inventors
- 👤 Walter F Coleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:27
CPC Classifications
C; C07; C07D; C07D235/00; C07D235/02; C07D235/04; C07D235/06; C07D235/08; C07D235/10; C07D235/16; C07D235/24; C07D235/30; C07D249/00; C07D249/16; C07D249/18; D; D06; D06L; D06L4/00; D06L4/10; D06L4/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
142 words
THE METHOD OF BLEACING A COTTON TEXTILE COMPRISIN DAMPENING SAID TEXTILE WITH FROM 50 TO 150% OF ITS DRY WEIGHT OF AN AQUEOUS SOLUTION CONTAINING ALKALI EQUIVALENT TO FROM 1 TO 6% CAUSTIC SODA, THEN SUBJECTING THE DAMPENED TEXTILE TO THE DIRECT ACTION OF SATURATED STEAM AT A TEMPERATURE OF FROM 275 TO 400%F. AND AT A PRESSURE CORRESPONDING TO SAID TEMPERATURE; DAMPENING TO SO-TREATED TEXTILE WITH FROM 50 TO 150% OF ITS DRY WEIGHT OF AN AQUEOUS ALKALINE HYDROGEN PEROXIDE SOLUTION CONTAINING FROM 0.05 TO 3* HYDROGEN PEROXIDE, AND BLEACHING THE TEXTILE DAMPENED WITH THE HYDROGEN PEROXIDE SOLUTION BY SUBJECTING IT TO THE DIRECT ACTION OF SATURATED STEAM AT A TEMPERATURE OF 275 TO 400*F. AND AT A PRESSURE CORRESPONGING TO SAID LAST NAMED TEMPERATURE, THE TIME PERIODS FOR BOTH OF SAID STEAMING TREATMENTS NOT EXCEEDING A TOTAL OF 60 SECONDS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |