US2702124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water clarification system
Assignee: Individual
•
Filing: 1951-02-20
•
Granted: 1955-02-15
•
Expires: 1971-02-20
Abstract
No abstract record available.
Inventors
- 👤 Stengel Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:52
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/006; C02F3/00; C02F3/02; C02F3/04; C02F3/043; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE516440C
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GB190628977A
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AT79563B
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DE446086C
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US2118157A
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US2185785A
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US2098463A
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US2155960A
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US2267516A
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US2417688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-14 | 1958-08-16 | 1959-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-14 | 1962-08-16 | 1963-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-14 | 1966-08-16 | 1967-02-15 | $7700.00 | Window Closed / Lapsed |