US3544436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodialysis process and apparatus
Assignee: Dairy Technology Ltd
•
Filing: 1969-03-27
•
Granted: 1970-12-01
•
Expires: 1989-03-27
Abstract
No abstract record available.
Inventors
- 👤 Leo H Francis
- 👤 Gerald J Treleven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:41
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; A; A23; A23C; A23C9/00; A23C9/14; A23C9/144; B01D61/46; B01D61/50; C; C02; C02F; C02F1/00; C02F1/42; C02F1/46; C02F1/469; C02F1/4693; C02F1/4604; C02F1/4695; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/46115; C02F2201/4612; C02F2201/46125; C02F2209/00; C02F2209/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2631100A
Cited
US2758965A
Cited
US3291716A
Cited
US3369906A
Cited
US3440159A
Cited
US3383245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |