US3188997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine propulsion system
Assignee: Individual
•
Filing: 1963-11-27
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Granted: 1965-06-15
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Expires: 1983-11-27
Abstract
No abstract record available.
Inventors
- 👤 Willard R Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:49
CPC Classifications
B; B63; B63H; B63H11/00; B63H11/02; B63H11/04; B63H11/08; B63H11/12; B63H2011/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROPULSION DEVICE COMPRISING AN ELONGATED BODY HAVING A FORWARDLY OPENING FRONT VENTURI CAVITY AND A REARWARDLY OPENING REAR VENTURI CAVITY, CENTRAL PASSAGE MEANS COMMUNICATIVELY CONNECTING THE REAR END OF THE FRONT VENTURI CAVITY TO THE FORWARD END OF THE REAR VENTURI CAVITY, PUMP MEANS TO SUPPLY LIQUID UNDER PRESSURE INTO THE FRONT VENTURI CAVITY, AND MEANS TO ADMIT GAS UNDER PRESSURE INTO THE INTAKE PORTION OF THE REAR VENTURI CAVITY CONCENTRICALLY AROUND THE OUTLET OF SAID CENTRAL PASSAGE MEANS.
Claim 2
Dependent Claim
80 words
A PROPULSION DEVICE COMPRISING AN ELONGATED BODY HAVING A FORWARDLY OPENING FRONT VENTURI CAVITY AND A REARWARDLY OPENING REAR VENTURI CAVITY, CENTRAL PASSAGE MEANS COMMUNICATIVELY CONNECTING THE REAR END OF THE FRONT VENTURI CAVITY TO THE FORWARD END OF THE REAR VENTURI CAVITY, PUMP MEANS TO SUPPLY LIQUID UNDER PRESSURE INTO THE FRONT VENTURI CAVITY, AND MEANS TO ADMIT GAS UNDER PRESSURE INTO THE INTAKE PORTION OF THE REAR VENTURI CAVITY CONCENTRICALLY AROUND THE OUTLET OF SAID CENTRAL PASSAGE MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |