US3395087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodialysis cell
Assignee: Sulphite Products Corp
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Filing: 1964-06-09
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Granted: 1968-07-30
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Expires: 1984-06-09
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Mcelhinney
- 👤 George A Dubey
- 👤 Bernard F Lueck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:06
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; D; D21; D21C; D21C11/00; D21C11/0042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |