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US3398091A
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Membrane separation apparatus and process
Assignee: Veolia WTS Systems USA Inc
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Filing: 1966-08-09
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Granted: 1968-08-20
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Expires: 1986-08-09
Abstract
No abstract record available.
Inventors
- 👤 John L Greatorex
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:35
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/36; B01D61/362; B01D53/00; B01D53/22; B01D63/00; B01D63/08; B01D63/082; B01D63/084; Y; Y10; Y10S; Y10S159/00; Y10S159/27; Y10S159/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2386826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |