US3209719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface propelling system
Assignee: Individual
•
Filing: 1963-03-01
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Granted: 1965-10-05
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Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
- 👤 Eugene J Christopher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:45
CPC Classifications
B; B63; B63H; B63H19/00; Y; Y10; Y10S; Y10S297/00; Y10S297/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PRESSURE VARIABLE SURFACE DEVICE ADAPTED TO BE EXPOSED TO A LIQUID MEDIUM COMPRISING, AN INNER RIGID MEMBER DEFINING A PREDETERMINED CONTINUOUS SURFACE, AN OUTER ELASTICALLY DEFORMABLE MEMBER SPACED FROM SAID INNER MEMBER DEFINING A CONTINUOUS VARYING SURFACE EXPOSED TO THE LIQUID MEDIUM, MEANS INTERCONNECTING SAID INNER AND OUTER MEMBERS TO FORM A PLURALITY OF FLUID PRESSURE CHAMBERS THEREBETWEEN AND HYDROSTATIC EXPANSION MEANS OPERATIVELY CONNECTED TO SAID CONTINUOUS SURFACE OF THE OUTER MEMBER TO THAT OF A TRAVELLING WAVE.
Claim 2
Dependent Claim
79 words
A PRESSURE VARIABLE SURFACE DEVICE ADAPTED TO BE EXPOSED TO A LIQUID MEDIUM COMPRISING, AN INNER RIGID MEMBER DEFINING A PREDETERMINED CONTINUOUS SURFACE, AN OUTER ELASTICALLY DEFORMABLE MEMBER SPACED FROM SAID INNER MEMBER DEFINING A CONTINUOUS VARYING SURFACE EXPOSED TO THE LIQUID MEDIUM, MEANS INTERCONNECTING SAID INNER AND OUTER MEMBERS TO FORM A PLURALITY OF FLUID PRESSURE CHAMBERS THEREBETWEEN AND HYDROSTATIC EXPANSION MEANS OPERATIVELY CONNECTED TO SAID CONTINUOUS SURFACE OF THE OUTER MEMBER TO THAT OF A TRAVELLING WAVE.
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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |