US2646368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-repellent nonfibrous cellulosic material and process of preparing same
Assignee: Wyeth Holdings LLC
•
Filing: 1952-07-01
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Granted: 1953-07-21
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Expires: 1972-07-01
Abstract
No abstract record available.
Inventors
- 👤 William M Wooding
- 👤 Suen Tzeng Jiueq
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:34
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/49; D21H17/50; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J2301/00; C08J2475/00; C08J2475/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31953
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR TREATING NON-FIBROUS REGENERATED CELLULOSIC FILMS COMPRISING THE STEPS IMPREGNATING THE SURFACE OF SAID FILMS WITH A WATER SOLUBLE UREA-FORMALDEHYDE RESIN MODIFIED BY REACTION WITH A COMPOUND HAVING THE GENERAL FORMULA: NH2(CH2)NOSO3X, WHEREIN N IS A WHOLE NUMBER BETWEEN 1 AND 6, INCLUSIVE, AND X IS A MEMBER OF THE GROUP CONSISTING OF H. LI, NA, NH4,K AND HYDROGEN IN COMBINATION WITH A WATER SOLUBLE TERTIARY AMINE, WHEREIN THE MOL RATIOS OF UREA, FORMALDEHYDE AND AFOREMENTIONED COMPOUND ARE WITHIN THE RANGE 1:1.50.015 AND 1:3.0:0925, RESPECTIVELY, INTRODUCING A PLASTICIZING AGENT INTO THE FILM, DRYING THE FILM, THEREBY PARTIALLY POLYMERIZING SAID RESIN AND APPLYING A WATER REPELLENT COATING THERETO.
Claim 2
Dependent Claim
109 words
A PROCESS FOR TREATING NON-FIBROUS REGENERATED CELLULOSIC FILMS COMPRISING THE STEPS IMPREGNATING THE SURFACE OF SAID FILMS WITH A WATER SOLUBLE UREA-FORMALDEHYDE RESIN MODIFIED BY REACTION WITH A COMPOUND HAVING THE GENERAL FORMULA: NH2(CH2)NOSO3X, WHEREIN N IS A WHOLE NUMBER BETWEEN 1 AND 6, INCLUSIVE, AND X IS A MEMBER OF THE GROUP CONSISTING OF H. LI, NA, NH4,K AND HYDROGEN IN COMBINATION WITH A WATER SOLUBLE TERTIARY AMINE, WHEREIN THE MOL RATIOS OF UREA, FORMALDEHYDE AND AFOREMENTIONED COMPOUND ARE WITHIN THE RANGE 1:1.50.015 AND 1:3.0:0925, RESPECTIVELY, INTRODUCING A PLASTICIZING AGENT INTO THE FILM, DRYING THE FILM, THEREBY PARTIALLY POLYMERIZING SAID RESIN AND APPLYING A WATER REPELLENT COATING THERETO.
References Cited (Backward Citations)
US2389416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |