US3595768A
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 DEMINERALIZED IN A MULTICHAMBER ELECTRODIALYSIS CELL COMPRISING ION EXCHANGE MEMBRANES AND NEUTRAL MEMBRANES. CALCIUM PRECIPITATION OCCURRING IN THE CELL AS A RESULT OF ACCIDENTAL WHEY LEAKAGE INTO THE CONCENTRATING CHAMBERS IS SHARPLY REDUCED BY TEMPERATURE REDUCTION OF THE RECIRCULATING WHEY STREAMS, BETWEEN PASSES, BELOW 85*F.
Inventors
- 👤 John R Scheder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:18
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; A; A23; A23C; A23C9/00; A23C9/14; A23C9/144; B01D61/52
Claims Analysis
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References Cited (Backward Citations)
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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 |