US4925541B1
Expired / Lapsed
US
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Electrodeionization apparatus and method
Assignee: EMD Millipore Corp
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Filing: 1986-09-18
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Granted: 1994-08-02
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Expires: 2006-09-18
Abstract
No abstract record available.
Inventors
- 👤 Anthony J Giuffrida
- 👤 Anil D Jha
- 👤 Gary C Ganzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:32
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/469; C02F1/4693; C02F1/4695; B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; B01D61/46; B01D61/48; B01J; B01J47/00; B01J47/02; B01J47/06; B01J47/08; C02F1/42; C02F1/4604; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/46115; C02F2201/4612; C02F2201/46125; C02F2201/4613; C02F2209/00; C02F2209/05
Claims Analysis
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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) | 1997-08-01 | 1998-01-31 | 1998-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-01 | 2002-01-31 | 2002-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-01 | 2006-01-31 | 2006-08-02 | $7700.00 | Window Closed / Lapsed |