Patent US2430749A successfully refreshed from Google Patents.
US2430749A
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Sewage disposal equipment
Assignee: Individual
•
Filing: 1945-07-19
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Granted: 1947-11-11
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Expires: 1965-07-19
Abstract
No abstract record available.
Inventors
- 👤 John W Van Denburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:07
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/231; B01F23/23105; B01F23/2312; B01F23/23126; B01F23/231265; B01F23/2311; B01F23/23114; B01F23/231143; B01F23/23123; C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/20; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S261/00; Y10S261/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2212841A
Cited
US2221346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-10 | 1951-05-12 | 1951-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-10 | 1955-05-12 | 1955-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-10 | 1959-05-12 | 1959-11-11 | $7700.00 | Window Closed / Lapsed |