US2882121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permonosulfuric acid for bleaching synthetic polymer textiles
Assignee: Stevensons Dyers Ltd
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Filing: 1954-12-07
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Granted: 1959-04-14
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Expires: 1974-12-07
Abstract
No abstract record available.
Inventors
- 👤 Eric T Fell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:35
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/10; D06L4/13; Y; Y10; Y10S; Y10S8/00; Y10S8/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PROCESS WHICH COMPRISES, CONTACTING A WHOLLY SYNTHETIC LINEAR ORGANIC POLYMER TEXTILE SELECTED FROM THE GROUP CONSISTING OF A POLYAMIDE TEXTILE AND A POLYACRYLONITRILE TEXTILE WITH AN ACID AQUEOUS BATH CONTAINING PERMONOSULPHURIC ACID FOR A SUFFICIENT TIME TO BLEACH SAID TEXTILE, WHILE PRESERVING ITS DESIRABLE CHARACTERISTICS UNIMPAIRED.
Claim 2
Dependent Claim
47 words
A PROCESS WHICH COMPRISES, CONTACTING A WHOLLY SYNTHETIC LINEAR ORGANIC POLYMER TEXTILE SELECTED FROM THE GROUP CONSISTING OF A POLYAMIDE TEXTILE AND A POLYACRYLONITRILE TEXTILE WITH AN ACID AQUEOUS BATH CONTAINING PERMONOSULPHURIC ACID FOR A SUFFICIENT TIME TO BLEACH SAID TEXTILE, WHILE PRESERVING ITS DESIRABLE CHARACTERISTICS UNIMPAIRED.
References Cited (Backward Citations)
FR784828A
Cited
US2077103A
Cited
FR798566A
Cited
US2426142A
Cited
US2432448A
Cited
US2643934A
Cited
US2701178A
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US2739034A
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US2720440A
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US2720441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |