US3595769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of calcium precipitation in the electrodialytic demineralization of whey
Assignee: NORTHLAND FOODS COOPERATIVE A WISCONSIN COOPERATIVE ASSOCIATION
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Filing: 1969-02-27
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Granted: 1971-07-27
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Expires: 1989-02-27
Abstract
Abstract WHEY IS DETERMINED IN A MULTICHAMBER ELECTRODIALYSIS CELL COMPRISING CATION MEMBRANES AND NEUTRAL MEMBRANES IN ALTERNATING SEQUENCE. CALCIUM PRECIPITATION ON THE NEUTRAL MEMBRANE FACE IN THE WHEY STREAM IS FOUND TO BE RELATED TO THE ELECTRICAL CONDUCTIVITY OF THE ADJACENT SALT STREAM, AND A CRITICAL CONDUCITITY RANGE IS DETERMINED WITHIN WHICH THE PRODUCTIVITY LOSS IS AT A MINIMUM, INCLUDING AN OPTIMUM CONDUCITIVITY VALUE AT WHICH PRODUCTIVITY LOSS DUE TO SUCH CALCIUM PRECIPITATION IS PRACTICALLY ZERO.
Inventors
- 👤 John R Scheder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:48
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; A; A23; A23C; A23C9/00; A23C9/14; A23C9/144
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |