US3392840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular reverse osmosis apparatus
Assignee: UNIVERSAL WALTER Corp
•
Filing: 1965-12-28
•
Granted: 1968-07-16
•
Expires: 1985-12-28
Abstract
No abstract record available.
Inventors
- 👤 George B Clark
- 👤 Manjikian Serop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:21
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/02; B01D61/08; B01D63/00; B01D63/06; B01D63/062; B01D63/063; B01D63/066; B01D2319/00; B01D2319/02; B01D2319/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US635934A
Cited
US3339341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |