US3071705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic propulsion means
Assignee: Grumman Corp
•
Filing: 1958-10-06
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Granted: 1963-01-01
•
Expires: 1978-10-06
Abstract
No abstract record available.
Inventors
- 👤 William J Coleman
- 👤 Santo Daniel F De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:53
CPC Classifications
F; F03; F03H; F03H1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
AN ELECTROSTATIC PROPULSION DEVICE COMPRISING MEANS FOR IONIZING A FLUID, AN ELECTRICALLY ENERGIZED CONDUCTING SURFACE POSITIONED RELATIVE TO SAID IONIZING MEANS AND ADAPTED TO PRODUCE AN ELECTROSTATIC FIELD WHOSE LINES OF FORCE CONCENTRATE ALONG AN AXIS SUBSTANTIALLY PASSING THROUGH SAID IONIZING MEANS, THOSE LINES OF FORCE EMANATING FROM SAID IONIZING MEANS, A PLURALITY OF CONDUCTING SURFACES SPACED FROM EACH OTHER AND DOWNSTREAM FROM SAID ELECTRICALLY ENERGIZED CONDUCTING SURFACE, A CONNECTOR BETWEEN SAID ELECTRICALLY ENERGIZED CONDCTING SURFACE AND
Claim 2
Dependent Claim
77 words
AN ELECTROSTATIC PROPULSION DEVICE COMPRISING MEANS FOR IONIZING A FLUID, AN ELECTRICALLY ENERGIZED CONDUCTING SURFACE POSITIONED RELATIVE TO SAID IONIZING MEANS AND ADAPTED TO PRODUCE AN ELECTROSTATIC FIELD WHOSE LINES OF FORCE CONCENTRATE ALONG AN AXIS SUBSTANTIALLY PASSING THROUGH SAID IONIZING MEANS, THOSE LINES OF FORCE EMANATING FROM SAID IONIZING MEANS, A PLURALITY OF CONDUCTING SURFACES SPACED FROM EACH OTHER AND DOWNSTREAM FROM SAID ELECTRICALLY ENERGIZED CONDUCTING SURFACE, A CONNECTOR BETWEEN SAID ELECTRICALLY ENERGIZED CONDCTING SURFACE AND
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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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |