US3209849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clearance modulated frictionless attraction device for increasing the tractive engagement between vehicles and the supporting surface
Assignee: Motors Liquidation Co
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Filing: 1963-03-11
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Granted: 1965-10-05
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Expires: 1983-03-11
Abstract
No abstract record available.
Inventors
- 👤 Theodore R Gondert
- 👤 David R Snoeyenbos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:48
CPC Classifications
B; B62; B62D; B62D49/00; B62D49/06; B62D49/0621
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
IN COMBINATION WITH A SURFACE ENGAGEABLE MEMBER, A DEVICE FOR PROVIDING FRICTIONLESS ATTRACTION FORCE URGING SAID MEMBER INTO ENGAGEMENT WITH SAID SURFACE COMPRISING, A SURFACE PROXIMATE SUBAMBIENT PRESSURE ENERGIZED FLUID BEARING AND A SUBAMBIENT PRESSURE ENERGIZED FLUID SPRING DISPOSED BETWEEN SAID MEMBER AND SURFACE, MEANS PROVIDING MECHANICAL SERIES RELATION BETWEEN SAID SPRING AND BEARING, AND MEANS PROVIDING FLUID SERIES RELATION BETWEEN SAID SPRING AND BEARING.
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 |