US3478690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recirculating system for a self-contained sewage unit
Assignee: Kidde Inc
•
Filing: 1967-12-28
•
Granted: 1969-11-18
•
Expires: 1987-12-28
Abstract
No abstract record available.
Inventors
- 👤 Robert C Helke
- 👤 Wayne E Sturgeon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:34
CPC Classifications
F; F04; F04D; F04D3/00; F04D29/00; F04D29/60; F04D29/64; F04D29/648; F04D29/70; F04D29/708
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3342341A
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US3364860A
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US3356221A
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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) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |