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US2720441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peroxygen bleaching of nylon
Assignee: EIDP Inc
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Filing: 1953-09-21
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Granted: 1955-10-11
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Expires: 1973-09-21
Abstract
No abstract record available.
Inventors
- 👤 John G Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:01
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/10; D06L4/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
THE METHOD OF BLEACHING NYLON COMPRISING SUBJECTING A NYLON MATERIAL TO THE ACTION OF AN AQUEOUS BLEACHING MEDIUM HAVING DISSOLVED THEREIN A PEROXYGEN COMPOUND AND AT LEAST 4%, BASED UPON THE TOTAL WEIGHT OF SAID MEDIUM, OF AN ALIPHATIC CARBOXYLIC ACID HAVING A DISSOCIATION CONSTANT IN THE RANGE 1.0X10-3 TO 1.0X10-6.
Claim 2
Independent Claim
51 words
THE METHOD OF BLEACHING NYLON COMPRISING SUBJECTING A NYLON MATERIAL TO THE ACTION OF AN AQUEOUS BLEACHING MEDIUM HAVING DISSOLVED THEREIN A PEROXYGEN COMPOUND AND AT LEAST 4%, BASED UPON THE TOTAL WEIGHT OF SAID MEDIUM, OF AN ALIPHATIC CARBOXYLIC ACID HAVING A DISSOCIATION CONSTANT IN THE RANGE 1.0X10-3 TO 1.0X10-6.
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) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |