Patent US3291679A successfully refreshed from Google Patents.
US3291679A
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Reaction product of a polymeric alpha-olefin-maleic imide-amine and an epihalohydrin and sizing paper therewith
Assignee: Monsanto Co
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Filing: 1965-06-29
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Granted: 1966-12-13
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Expires: 1985-06-29
Abstract
No abstract record available.
Inventors
- 👤 Joseph P O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:50
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/38; C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A COMPOSITION COMPRISING THE REACTION PRODUCT OF AN EPIHALOHYDRIN WITH AN ALPHA-OLEFIN/IMIDE-AMINE POLYMER FORMED BY THE REACTION OF AN ALPHA-OLEFIN/ALPHA, BETA OLEFINICALLY UNSATURATED POLYCARBOXYLIC ACID ANHYDRIDE COPOLYMER WITH A DIAMINE CONTAINING AT LEAST ONE PRIMARY AMINO GROUP, THE ALPHA-OELFIN CONTAINING AN AVERAGE OF FROM 2 TO 40 CARBON ATOMS, THE RATIO OF SAID ANHYDRIDE TO THE ALPHA-OLEFIN IN SAID COPOLYMER BEING FROM ABOUT 0.9:1 TO ABOUT 1.8:1, AND THE RATIO OF EPOXIDE TO CYCLIC IMIDE GROUPS IN SAID EPIHALOHYDRINATED REACTION PRODUCT BEING BETWEEN ABOUT 0.1:1 AND 1:1.
Claim 2
Independent Claim
49 words
A METHOD OF IMPROVING THE PROPERTIES OF A WATERLAID CELLULOSIC WEB WHICH COMPRISES (A) ADDING TO AN AQUEOUS SLURRY OF PAPERMAKING CELLULOSIC FIBERS A POLY-MERIC COMPOSITION ON THE FIBERS, AND (C) FORMING THE POLYMERIC COMPOSITION ON THE FIBERS, AND (C) FORMING THE TREATED FIBERS THUS OBTAINED INTO A WEB.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |