US2533557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated, nonfibrous regenerated cellulose sheet wrapping material and process of making same
Assignee: EIDP Inc
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Filing: 1949-04-15
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Granted: 1950-12-12
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Expires: 1969-04-15
Abstract
No abstract record available.
Inventors
- 👤 Chapman Aurelius Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:23
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/043; C08J7/052; C08J2301/00; C08J2301/06; C08J2475/00; C08J2475/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31953
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
THE PROCESS OF PRODUCING COATED, TRANSPARENT, SHEET WRAPING MATERIAL WHICH COMPRISES IMPREGNATING GEL REGENERATED CELLULOSE FILM WITH AN AQUEOUS SOFTENING BATH CONTAINING FROM 0.05% TO 10% BY WEIGHT OF A WATER-SOLUBLE, PARTIALLY CONDENSED GUANIDINE-UREA-FORMALDEHYDE GUANIDINE AND UREA IN TEH PROPORTIONS OF FORM 1 TO 4 MOLS OF FORMALDEHYDE AND FROM 0.02 TO 0.25 MOL OF GUANIDINE PER MOL OF UREA, DRYING THE IMPREGNATED FILM AND THEREAFTER COATING THE IMPREGNATED FILM WITH A PROTECTIVE COMPOSITION FROM THE GROUP CONSISTING OF MOISTUREPROOFING AND SEMIMOISTUREPROOFING COATING COMPOSITIONS FOR REGENERATED CELLULOSE CONTAINING FROM 0.1% TO 10.0% BY WEIGHT, BASED ON TEH SOLIDS CONTENT OF THE COMPOSITION OF MALEIC ACID.
References Cited (Backward Citations)
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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) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |