US2815943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffuser tube
Assignee: Chicago Pump Co
•
Filing: 1951-01-16
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Granted: 1957-12-10
•
Expires: 1971-01-16
Abstract
No abstract record available.
Inventors
- 👤 Miles A Lamb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:02
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/20; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/231; B01F23/23105; B01F23/2311; B01F23/23114; B01F23/231142; B01F23/231143; B01F23/2312; B01F23/23124; B01F23/231245; C02F3/203; B01F23/23125; B01F23/23126; B01F23/231265; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S261/00; Y10S261/47; Y10S261/70
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |