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Patent US2996744A successfully refreshed from Google Patents.
US2996744A
Expired / Lapsed
US
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Combination cleaning swab and septic tank activator
Assignee: Individual
•
Filing: 1958-04-21
•
Granted: 1961-08-22
•
Expires: 1978-04-21
Abstract
No abstract record available.
Inventors
- 👤 Dorothy F Rodgers
- 👤 Godowsky Leopold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:10
CPC Classifications
A; A47; A47K; A47K11/00; A47K11/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1420180A
Cited
US1662426A
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US1751495A
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US2288714A
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US2560649A
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US2528403A
Cited
US2816311A
Cited
US2690661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |