US3174874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of surface sizing paper with stable cation-active plastic dispersions
Assignee: BASF SE
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Filing: 1960-11-28
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Granted: 1965-03-23
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Expires: 1980-11-28
Abstract
No abstract record available.
Inventors
- 👤 Fikentscher Hans
- 👤 Herrle Karl
- 👤 Winter Gernot
- 👤 Mueller Alfred
- 👤 Reich Johann Georg
- 👤 Voss Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:23
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/44; D21H17/45; D21H17/455; C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24; C08F2/28; C08F26/00; C08F26/06; C08F28/00; C08F4/00; C08F4/06; C08F4/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS FOR THE SURFACE OF PAPER WHICH COMPRISES APPLYING TO THE SURFACE OF PAPER AN AQUEOUS DISPERSION OF THE CATION-ACTIVE COPOLYMER OF (A) 15 TO 50% BY WEIGHT, BASED UPON THE TOTAL WEIGHT OF THE COPOLYMER, OF A HETEROCYCLIC COMPOUND BEARING A SINGLE QUATERNARY NITROGEN ATOM IN THE NUCLEUS, SAID HETROCYCLIC COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF THE N- AND C-VINYL SUBSTITUTED DERIVATIVES OF IMIDAZOLE, PYRIDINE AND QUINOLINE, AND (B) 85 TO 50% BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE COPOLYMER, OF DIFFICULTY WATER-SOLUBLE ETHYLENICALLY UNSATURATED MONOMERS.
Claim 2
Dependent Claim
92 words
A PROCESS FOR THE SURFACE OF PAPER WHICH COMPRISES APPLYING TO THE SURFACE OF PAPER AN AQUEOUS DISPERSION OF THE CATION-ACTIVE COPOLYMER OF (A) 15 TO 50% BY WEIGHT, BASED UPON THE TOTAL WEIGHT OF THE COPOLYMER, OF A HETEROCYCLIC COMPOUND BEARING A SINGLE QUATERNARY NITROGEN ATOM IN THE NUCLEUS, SAID HETROCYCLIC COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF THE N- AND C-VINYL SUBSTITUTED DERIVATIVES OF IMIDAZOLE, PYRIDINE AND QUINOLINE, AND (B) 85 TO 50% BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE COPOLYMER, OF DIFFICULTY WATER-SOLUBLE ETHYLENICALLY UNSATURATED MONOMERS.
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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |