US2920984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper coating composition, paper coated therewith, and method of improving the strength of paper
Assignee: Individual
•
Filing: 1953-03-30
•
Granted: 1960-01-12
•
Expires: 1973-03-30
Abstract
No abstract record available.
Inventors
- 👤 John T Moynihan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:25
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/06; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/49; D21H17/50; D21H19/00; D21H19/36; D21H19/44; D21H19/62; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A METHOD FOR TREATING FIBROUS CELLULOSE MATERIALS WHICH COMPRISES IMMERSING THE MATERIAL IN A BATH CONSISTING ESSENTIALLY OF 15-20 PERCENT BY WEIGHT OF A WATERSOLUBLE POLYHYDRIC ALCOHOL SELECTED FROM THE GROUP CONSISTING OF GLYCEROL, MANNITOL, AND SORBITOL, 10-15 PERCENT BY WEIGHT UREA-FORMALDEHYDE RESIN, AND THE REMAINDER WATER, AND DRYING THE MATERIAL AT A TEMPERATURE OF AT LEAST 60 DEGREES CENTIGRADE.
Claim 2
Independent Claim
60 words
A METHOD FOR TREATING FIBROUS CELLULOSE MATERIALS WHICH COMPRISES IMMERSING THE MATERIAL IN A BATH CONSISTING ESSENTIALLY OF 15-20 PERCENT BY WEIGHT OF A WATERSOLUBLE POLYHYDRIC ALCOHOL SELECTED FROM THE GROUP CONSISTING OF GLYCEROL, MANNITOL, AND SORBITOL, 10-15 PERCENT BY WEIGHT UREA-FORMALDEHYDE RESIN, AND THE REMAINDER WATER, AND DRYING THE MATERIAL AT A TEMPERATURE OF AT LEAST 60 DEGREES CENTIGRADE.
References Cited (Backward Citations)
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Cited
US2417014A
Cited
US2596939A
Cited
US2564925A
Cited
US2684919A
Cited
US2699406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |