US2984250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water treating system
Assignee: Individual
•
Filing: 1957-09-16
•
Granted: 1961-05-16
•
Expires: 1977-09-16
Abstract
No abstract record available.
Inventors
- 👤 Eugene L Foster
- 👤 Robert J Krooss
- 👤 Edwin H Nahikian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:15
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/006; C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2526; Y10T137/8593; Y10T137/8597
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1443675A
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US1693647A
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US1897492A
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US2058508A
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GB576560A
Cited
US2573299A
Cited
DE815472C
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US2614885A
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US2679835A
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US2710016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |