US3674632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for moisture stabilizing cellulosic sheet material using a polyoxyalkylene glycol and a polyoxyethylene-oxypropylene glycol block polymer
Assignee: Individual
•
Filing: 1969-09-08
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Granted: 1972-07-04
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Expires: 1989-09-08
Abstract
Abstract A MOISTURE-STABILIZING COMPOSITION IS PROVIDED FOR CELLULOSIC SHEET MATERIAL, SUCH AS PAPER, COMPRISING A POLYOXALKYLENE GLYCOL AS A MOISTURE-STABILIZER, AND A POLYOXYETHYLENE-OXYPROPYLENE GLYCOL BLOCK POLYMER, TO ENHANCE THE RATE OF ABSORPTION OF THE POLYOXYALKYLENE GLYCOL IN THE SHEET MATERIAL. A PROCESS FOR MOISTURE-STABILIZING CELLULOSIC SHEET MATERIAL ALSO IS PROVIDED, WHICH COMPRISES INCORPORATING SUCH A COMPOSITION IN THE CELLULOSIC MATERIAL.
Inventors
- 👤 Johan Jakob Wennergren
- 👤 Lars-Gunnar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:54
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/53
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |