US2955905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peroxide-ester bleaching process and compositions
Assignee: Lever Brothers Co
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Filing: 1956-07-25
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Granted: 1960-10-11
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Expires: 1976-07-25
Abstract
No abstract record available.
Inventors
- 👤 Davies Thomas Daniel
- 👤 Hampson George Charlesworth
- 👤 Mcdonnell Francis Robe Maxwell
- 👤 Schmerlaib Gert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:16
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3907; C11D3/391; D; D06; D06L; D06L4/00; D06L4/10; D06L4/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS OF BLEACHING SOILED TEXTILE MATERIALS COMPRISING THE STEPS OF PLACING THE ARTICLE TO BE BLEACHED IN AN AQUEOUS SOLUTION OF HYDROGEN PERIOXIDE AND AN ORGANIC CARBOXYLIC ESTER HAVING A TITRE IN THE PER-ACID FORMATION TEST OF NOT LESS THAN 1.5 ML. 0.1 N NA2S2O3, ALLOWING THE ARTICLE TO REMAIN IN THE SOLUTION FOR A NORMAL WASHING PERIOD AND RINSING THE ARTICLE.
Claim 2
Dependent Claim
63 words
A PROCESS OF BLEACHING SOILED TEXTILE MATERIALS COMPRISING THE STEPS OF PLACING THE ARTICLE TO BE BLEACHED IN AN AQUEOUS SOLUTION OF HYDROGEN PERIOXIDE AND AN ORGANIC CARBOXYLIC ESTER HAVING A TITRE IN THE PER-ACID FORMATION TEST OF NOT LESS THAN 1.5 ML. 0.1 N NA2S2O3, ALLOWING THE ARTICLE TO REMAIN IN THE SOLUTION FOR A NORMAL WASHING PERIOD AND RINSING THE ARTICLE.
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) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |