Patent US2546575A successfully refreshed from Google Patents.
US2546575A
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Process for treating nonfibrous regenerated cellulose
Assignee: Wyeth Holdings LLC
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Filing: 1949-08-06
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Granted: 1951-03-27
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Expires: 1969-08-06
Abstract
No abstract record available.
Inventors
- 👤 William M Wooding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:31
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J2301/00; C08J2301/06; C08J2475/00; C08J2475/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A PROCESS FOR TREATING NON-FIBROUS REGENERATED CELLULOSE FILM COMPRISING THE STEPS OF IMPREGNATING SAID FILM WITH AN AQUEOUS DISPERSION OF AN UREA-FORMALDEHYDE POLYFUNCTIONAL ALIPHATIC POLYAMINE CATIONIC RESIN AND AN AQUEOUS SOLUTION OF A PLASTICIZING AGENT, REMOVING THE FILM, DRYING THE FILM, AND APPLYING THERETO A WATER REPELLENT TOPCOAT.
Claim 2
Dependent Claim
48 words
A PROCESS FOR TREATING NON-FIBROUS REGENERATED CELLULOSE FILM COMPRISING THE STEPS OF IMPREGNATING SAID FILM WITH AN AQUEOUS DISPERSION OF AN UREA-FORMALDEHYDE POLYFUNCTIONAL ALIPHATIC POLYAMINE CATIONIC RESIN AND AN AQUEOUS SOLUTION OF A PLASTICIZING AGENT, REMOVING THE FILM, DRYING THE FILM, AND APPLYING THERETO A WATER REPELLENT TOPCOAT.
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) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |