Patent US1534511A successfully refreshed from Google Patents.
Patent US2938630A successfully refreshed from Google Patents.
US2938630A
Expired / Lapsed
US
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Septic tank with sterilizer
Assignee: Basic Research Corp
•
Filing: 1958-05-02
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Granted: 1960-05-31
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Expires: 1978-05-02
Abstract
No abstract record available.
Inventors
- 👤 Leo J Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:11
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28; C02F1/00; C02F1/02; C02F1/04; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/921
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US613093A
Cited
US1633079A
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US2243815A
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US2358841A
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US2666740A
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US2607493A
Cited
US2777816A
Cited
US2763335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |