Patent US3047566A successfully refreshed from Google Patents.
Patent US3709857A successfully refreshed from Google Patents.
US3709857A
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Neutral cure wet strength resins prepared by polymerizing glyoxalolated acrylamide with further acrylamide and a basic,nitrogen-containing monomer
Assignee: Kimberly Clark Tissue Co
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Filing: 1971-02-25
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Granted: 1973-01-09
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Expires: 1991-02-25
Abstract
Abstract HIGH MOLECULAR WEIGHT, PH INDEPENDENT THERMOSETTING CATIONIC, WET STRENGTH RESINS ARE PREPARED BY A TWO-STAGE PROCESS WHICH COMPRISES, FIRST, REACTING GLYOXAL WITH ACRYLAMIDE AND THE POLYMERIZATION THE GLYOCALOLATED ACRYLAMIDE WITH ACRYLAMIDE IN THE PRESENCE OF A BASIC NITROGEN-CONTAINING MONOMER. THESE RESINS ARE USEFUL IN THE PREPARATION OF PAPER PRODUCTS HAVING IMPROVED, OFF-MACHINE DRY STRENGTH AND WET STRENGTH PROPERTIES.
Inventors
- 👤 R Faessinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:24
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/44; D21H17/45; C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/58; D21H17/37; D21H17/38; D21H17/39
Claims Analysis
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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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |