US2563897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sizing cellulosic fibers with cationic melamine resin and hydrophobic material
Assignee: Wyeth Holdings LLC
•
Filing: 1945-07-13
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Granted: 1951-08-14
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Expires: 1965-07-13
Abstract
No abstract record available.
Inventors
- 👤 Lucius H Wilson
- 👤 Chester G Landes
- 👤 Charles S Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:14
CPC Classifications
D; D21; D21H; D21H23/00; D21H23/76; D21H23/765; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/35; D21H17/46; D21H17/47; D21H17/49; D21H17/51; D21J; D21J1/00; D21J1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN A METHOD OF MAKING A FORMED CELLULOSIC PRODUCT BY THE STEPS OF PREPARING AN AQUEOUS SUSPENSION OF FIBROUS CELLULOSIC MATERIAL, IMPREGNATING THE CELLULOSIC MATERIAL WITH A WATER INSOLUBLE HYDROPHOBIC ORGANIC IMPREGNATING AGENT AND FORMING THE IMPREGNATED CELLULOSIC MATERIAL INTO A FELTED PRODUCT, THE IMPROVEMENT WHICH CONSISTS IN FIRST ADDING A COLLOIDAL SOLUTION OF HYDROPHILIC CATIONIC MELAMINE-ALDEHYDE RESIN TO THE AQUEOUS FIBER SUSPENSION, THEN ADDING AN AQUEOUS DISPERSION CONTAINING THE IMPREGNATING AGENT IN DEFLOCCULATED CONDITION AND FLOCCULATING THE IMPREGNATING AGENT IN ADMIXTURE WITH THE SUSPENDED FIBERS BY THE ACTION OF THE CATIONIC MELAMINE-ALDEHYDE RESIN, AND THEREBY DEPOSITING A SUBSTANTIAL PROPORTION OF THE IMPREGNATING AGENT UNIFORMLY ON THE FIBERS ALONG WITH MELAMINE-ALDEHYDE RESIN.
Claim 2
Dependent Claim
112 words
IN A METHOD OF MAKING A FORMED CELLULOSIC PRODUCT BY THE STEPS OF PREPARING AN AQUEOUS SUSPENSION OF FIBROUS CELLULOSIC MATERIAL, IMPREGNATING THE CELLULOSIC MATERIAL WITH A WATER INSOLUBLE HYDROPHOBIC ORGANIC IMPREGNATING AGENT AND FORMING THE IMPREGNATED CELLULOSIC MATERIAL INTO A FELTED PRODUCT, THE IMPROVEMENT WHICH CONSISTS IN FIRST ADDING A COLLOIDAL SOLUTION OF HYDROPHILIC CATIONIC MELAMINE-ALDEHYDE RESIN TO THE AQUEOUS FIBER SUSPENSION, THEN ADDING AN AQUEOUS DISPERSION CONTAINING THE IMPREGNATING AGENT IN DEFLOCCULATED CONDITION AND FLOCCULATING THE IMPREGNATING AGENT IN ADMIXTURE WITH THE SUSPENDED FIBERS BY THE ACTION OF THE CATIONIC MELAMINE-ALDEHYDE RESIN, AND THEREBY DEPOSITING A SUBSTANTIAL PROPORTION OF THE IMPREGNATING AGENT UNIFORMLY ON THE FIBERS ALONG WITH MELAMINE-ALDEHYDE RESIN.
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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) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |