US3298775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for bleaching textile fibres and new bleaching compositions
Assignee: Air Liquide SA
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Filing: 1963-04-01
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Granted: 1967-01-17
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Expires: 1983-04-01
Abstract
No abstract record available.
Inventors
- 👤 Malafosse Jean
- 👤 Pierre H Gonse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:28
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/10; D06L4/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
54 words
A PROCESS FOR BLEACHING TEXTILE FIBERS COMPRISING IMMERSION IN A BLEACHING BATH CONTAINING AS A SOURCE OF ACTIVE OXYGEN A PEROXYGEN COMPOUND AND CONTAINING A SOURCE OF ACTIVE OXYGEN, COMPRISING ADDITIONALLY ADDING TO THE BLEACHING BATH A PHTHALIC ACID ANHYDRIDE HAVING IN ITS MOLECULE AT LEAST ONE HYDROGEN ATOM REPLACED BY AN ELECTRONEGATIVE GROUP.
Claim 2
Dependent Claim
54 words
A PROCESS FOR BLEACHING TEXTILE FIBERS COMPRISING IMMERSION IN A BLEACHING BATH CONTAINING AS A SOURCE OF ACTIVE OXYGEN A PEROXYGEN COMPOUND AND CONTAINING A SOURCE OF ACTIVE OXYGEN, COMPRISING ADDITIONALLY ADDING TO THE BLEACHING BATH A PHTHALIC ACID ANHYDRIDE HAVING IN ITS MOLECULE AT LEAST ONE HYDROGEN ATOM REPLACED BY AN ELECTRONEGATIVE GROUP.
Claim 3
Dependent Claim
35 words
A BLEACHING COMPOSITION FOR TEXTILE FIBERS, CONTAINING AS A SOURCE OF ACTIVE OXYGEN A PEROXYGEN COMPOUND AND A PHTHALIC ACID ANHYDRIDE HAVING IN ITS MOLECULE AT LEAT ONE HYDROGEN ATOM REPLACED BY AN ELECTRONEGATIVE GROUP.
Claim 4
Dependent Claim
35 words
A BLEACHING COMPOSITION FOR TEXTILE FIBERS, CONTAINING AS A SOURCE OF ACTIVE OXYGEN A PEROXYGEN COMPOUND AND A PHTHALIC ACID ANHYDRIDE HAVING IN ITS MOLECULE AT LEAT ONE HYDROGEN ATOM REPLACED BY AN ELECTRONEGATIVE GROUP.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |