US2913769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of puffing dry regenerated cellulose and cellulose acetate textile fibers by generating oxygen in situ and precipitating barium sulphate within the fibers
Assignee: Individual
•
Filing: 1953-07-06
•
Granted: 1959-11-24
•
Expires: 1973-07-06
Abstract
No abstract record available.
Inventors
- 👤 Kastli Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:28
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/32; D06M11/36; D06M11/48; D06M11/485; D06M11/07; D06M11/11; D06M11/155; D06M11/50; D06M11/51; D06M11/55; D06M11/56; Y; Y10; Y10S; Y10S424/00; Y10S424/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
THE PROCESS OF TREATING DRY TEXTILE FIBERS COMPOSED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF REGENERATED CELLULOSE AND CELLULOSE ESTERS OF ACETIC ACID; COMPRISING THE STEPS OF FIRST IMPREGNATING SAID MATERIAL WITH AN AQUEOUS SOLUTION OF ALKALI METAL PERMANGANATE SATURATED WITH BARIUM CHLORIDE, AND SUBSEQUENTLY SUBJECTING SAID MATERIAL FOR NOT MORE THAN TWO MINUTES TO THE ACTION OF AN AQUEOUS SOLUTION OF HYDROGEN PEROXIDE CONTAINING AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF SODIUM SULFATE AND MAGNESIUM SULFATE UNTIL OXYGEN BUBBLES ARE GENERATED WITHIN SAID FIBERS UNDER CONTROLLED CONDITIONS SO THAT THE GAS BUBBLES DO NOT BREAK THROUGH THE SURFACE OF THE FIBERS AND ENLARGED HOLLOW SPACES ARE FORMED WITHIN THE MICROFIBRILLAE OF SAID FIBERS AND BARIUM SULFATE IS PRECIPITATED WITHIN SAID HOLLOW SPACES.
Claim 2
Dependent Claim
128 words
THE PROCESS OF TREATING DRY TEXTILE FIBERS COMPOSED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF REGENERATED CELLULOSE AND CELLULOSE ESTERS OF ACETIC ACID; COMPRISING THE STEPS OF FIRST IMPREGNATING SAID MATERIAL WITH AN AQUEOUS SOLUTION OF ALKALI METAL PERMANGANATE SATURATED WITH BARIUM CHLORIDE, AND SUBSEQUENTLY SUBJECTING SAID MATERIAL FOR NOT MORE THAN TWO MINUTES TO THE ACTION OF AN AQUEOUS SOLUTION OF HYDROGEN PEROXIDE CONTAINING AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF SODIUM SULFATE AND MAGNESIUM SULFATE UNTIL OXYGEN BUBBLES ARE GENERATED WITHIN SAID FIBERS UNDER CONTROLLED CONDITIONS SO THAT THE GAS BUBBLES DO NOT BREAK THROUGH THE SURFACE OF THE FIBERS AND ENLARGED HOLLOW SPACES ARE FORMED WITHIN THE MICROFIBRILLAE OF SAID FIBERS AND BARIUM SULFATE IS PRECIPITATED WITHIN SAID HOLLOW SPACES.
References Cited (Backward Citations)
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Cited
FR17916E
Cited
US1068580A
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GB244446A
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GB299710A
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US1757757A
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US2018276A
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US2077103A
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FR819149A
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US2193173A
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US2414800A
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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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |