US3822178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for repulping waxed paper using a water soluble nonionic emulsifier
Assignee: Wright Chemical Corp
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Filing: 1971-08-11
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Granted: 1974-07-02
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Expires: 1991-08-11
Abstract
Abstract A PROCESS FOR REPULPING WAXED STOCK SUCH AS WAXED PAPER OR PAPERBOARD FOR USE IN FOURDRINIER, OR CYLINDER PAPERMAKING PROCESSES OR WET-LAP OR SCREW-PRESS DEWATERING PROCESSES. WAXED STOCK MATERIAL, EITHER ALONE OR WITH NON-WAXED STOCK IS CHARGED TO A PULPER AND COMBINED WITH WATER AND CERTAIN WATER SOLUBLE NONIONIC EMULSIFIERS WITH MECHANICAL AGITATION AND AT A TEMPERATURE SUFFICIENTLY HIGH TO MELT THE WAX IN THE WAXED STOCK. A DISPERSED WAX-FIBER SLURRY IS THEREBY FORMED WHICH CAN BE DILUTED FOR FURTHER PROCESSING IN A FOURDRINER OR CYLINDER MACHINE OR, THE THUS FORMED DISPERSED WAX-FIBER SLURRY MAY BE PROCESSED DIRECTLY IN A WET-LAP MACHINE.
Inventors
- 👤 Koeppen A Von
- 👤 R Carrera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:03
CPC Classifications
D; D21; D21C; D21C5/00; D21C5/02; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/64
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |