US3575796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper sizing with aziridines
Assignee: Ingredion Inc
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Filing: 1967-12-07
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Granted: 1971-04-20
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Expires: 1987-12-07
Abstract
Abstract SIZING OF PAPER AND PAPERBOARD PRODUCTS WHICH COMPRISES INTIMATELY DISPERSING, WITHIN THE AQUEOUS PULP SLURRY, OR APPLYING TO A PREPARED PAPER WEB, AN AQUEOUS EMULSION OF A N-SUBSTITUTED AZIRIDINE COMPOUND WHICH IS PREPARED BY MEANS OF THE REACTION BETWEEN A CARBONYL-SUBSTITUTED, ALPHA, BETA-ETHYLENICALLY UNSATURATED COMPOUND SUCH AS DISTEARYL MALEATE AND AN ALKYLENIMINE SUCH AS ETHYLENEIMINE. THE SIZING AGENT CAN BE UNIFORMLY DISPERSED WITH A CATIONIC EMULSIFIER, SUCH AS A CATIONIC STARCH, FOR BETTER RETENTION ON THE FIBERS.
Inventors
- 👤 Gerald H Brown
- 👤 Martin M Skoultchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:38
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/07
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |