US2495233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating cellulosic materials with trimethylolphenol
Assignee: Comptoir des Textiles Artificiels SA
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Filing: 1946-02-23
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Granted: 1950-01-24
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Expires: 1966-02-23
Abstract
No abstract record available.
Inventors
- 👤 Drisch Nicolas
- 👤 Fays Rene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:51
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/25; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/18; B01D71/00; B01D71/06; B01D71/08; B01D71/12; C; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/08; C08B15/00; C08B15/005; C08B15/10; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/10; C08G8/28; C08L; C08L1/00; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/41; D21H11/00; D21H11/16; D21H11/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A METHOD WHICH COMPRISES IMPREGNATING A PREFORMED CELLULOSIC STRUCTURE CONTAINING FREE HYDROXYL GROUPS WITH NOT IN EXCESS OF TEN PERCENT BY WEIGHT OF THE CELLULOSIC MATERIAL OF SAID STRUCTURE OF A NON-RESINOUS POLYMETHYLOLPHENOL REAGENT CONSISTING ESSENTIALLY OF A TRIMETHYLOLPHENOL AND CAPABLE OF FORMING RESINIFORM BRIDGE LINKAGES BETWEEN CELLULOSE CHAINS, FROM A SOLUTION OF SAID POLYMETHYLOLPHENOL REAGENT, AND SUBJECTING THE IMPREGNANTED SHAPED STRUCTURE TO A THERMAL TREATMENT TO THEREBY PRODUCE A RESINIFICATION OF THE BRIDGE LINKAGES.
Claim 2
Independent Claim
75 words
A METHOD WHICH COMPRISES IMPREGNATING A PREFORMED CELLULOSIC STRUCTURE CONTAINING FREE HYDROXYL GROUPS WITH NOT IN EXCESS OF TEN PERCENT BY WEIGHT OF THE CELLULOSIC MATERIAL OF SAID STRUCTURE OF A NON-RESINOUS POLYMETHYLOLPHENOL REAGENT CONSISTING ESSENTIALLY OF A TRIMETHYLOLPHENOL AND CAPABLE OF FORMING RESINIFORM BRIDGE LINKAGES BETWEEN CELLULOSE CHAINS, FROM A SOLUTION OF SAID POLYMETHYLOLPHENOL REAGENT, AND SUBJECTING THE IMPREGNANTED SHAPED STRUCTURE TO A THERMAL TREATMENT TO THEREBY PRODUCE A RESINIFICATION OF THE BRIDGE LINKAGES.
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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) | 1953-01-23 | 1953-07-25 | 1954-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-23 | 1957-07-25 | 1958-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-23 | 1961-07-25 | 1962-01-24 | $7700.00 | Window Closed / Lapsed |