US3833316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable volume pump
Assignee: MAG Aerospace Industries LLC
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Filing: 1972-01-17
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Granted: 1974-09-03
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Expires: 1992-01-17
Abstract
Abstract A PUMPING SYSTEM FOR A PLURALITY OF RECIRCULATING TOILETS SHARING A COMMON TANK IS DESCRIBED. A VARIABLE VOLUME PUMP HAS A BY-PASS VALVE WHICH IS CONTROLLED BY A PRESSURE SENSOR IN THE FLUSH LINE, TO PREVENT EXCESSIVE FLUID PRESSURE IN THE TOILETS. D R A W I N G
Inventors
- 👤 J Kemper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:33
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/043; E; E03; E03D; E03D5/00; E03D5/016; F04D15/00; F04D15/0005; F04D15/0011; F04D29/70; F04D29/708
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |