Patent US3099993A successfully refreshed from Google Patents.
US3099993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of increasing the efficiency of fluid flow
Assignee: Individual
•
Filing: 1960-07-22
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Granted: 1963-08-06
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Expires: 1980-07-22
Abstract
No abstract record available.
Inventors
- 👤 Edward H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:52
CPC Classifications
F; F15; F15D; F15D1/00; F15D1/02; F15D1/06; F15D1/065; Y; Y02; Y02T; Y02T70/00; Y02T70/10; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
THE METHOD OF REDUCING THE DRAG FORCE EXERTED UPON THE BOUNDARY OF AN OBJECT BEING PROPELLED THROUGH A BODY OF FLUID, WHICH COMPRISES INDEPENDENTLY OF THE PROPULSION OF SAID BODY GENERATING AN ELASTIC SELF-PROPAGATING TRAVELLING WAVE ALONG SAID BOUNDARY IN THE DIRECTION OF FLUID FLOW WITH RESPECT TO SAID BOUNDARY, THE AMPLITUDE OF SAID WAVE BEING VERY SMALL COMPARED TO THE HALF WAVELENGTH THEREOF.
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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) | 1966-08-05 | 1967-02-04 | 1967-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-05 | 1971-02-04 | 1971-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-05 | 1975-02-04 | 1975-08-06 | $7700.00 | Window Closed / Lapsed |