US3520803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Membrane fluid separation apparatus and process
Assignee: Veolia WTS Systems USA Inc
•
Filing: 1968-12-24
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Granted: 1970-07-21
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Expires: 1988-12-24
Abstract
No abstract record available.
Inventors
- 👤 William B Iaconelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:00
CPC Classifications
A; A23; A23F; A23F5/00; A23F5/24; A23F5/28; A23F5/285; B; B01; B01D; B01D63/00; B01D63/08; B01D63/082; B01D63/0822; B01D2313/00; B01D2313/08; B01D2313/086; B01D2313/14; Y; Y10; Y10S; Y10S159/00; Y10S159/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3398091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |