US3835006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing ionic substances from a pulp
Assignee: Dainichi Nippon Cables Ltd
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Filing: 1972-07-10
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Granted: 1974-09-10
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Expires: 1992-07-10
Abstract
Abstract A METHOD OF REMOVING IONIC SUBSTANCES FROM A PULP WHICH IS PARTICULARLY USEFUL IN PREPARING AN ELECTRICALLY INSULATING PAPER, WHICH COMPRISES CONTINUOUSLY PASSING A PULP SLURRY COMPRISING A DISPERSION OF PULP IN A LIQUID MEDIUM AT A CONCENTRATION OF 0.05% TO 6.0% BY WEIGHT BETWEEN OPPOSITELY CHARGED FACING ELECTRODES TO WHICH AN ELECTRIC POTENTIAL IS APPLIED TO REMOVE IONIC SUBSTANCES REMAINING IN THE PULP, THE PULP SLURRY HAVING AN ELECTRIC CONDUCTIVITY OF AT LEAST 10 UV./CM. DURING PASSING BETWEEN THE ELECTRODES.
Inventors
- 👤 H Fujita
- 👤 H Yamamoto
- 👤 F Itohara
- 👤 M Matsushita
- 👤 M Ishitobi
- 👤 H Suga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:50
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/08; H; H01; H01B; H01B3/00; H01B3/18; H01B3/48; H01B3/485
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |