US2946930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic suspension
Assignee: Daystrom Inc
•
Filing: 1955-06-20
•
Granted: 1960-07-26
•
Expires: 1975-06-20
Abstract
No abstract record available.
Inventors
- 👤 Roswell W Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:03
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/04; F16C32/0406; F16C32/044; F16C32/0444; Y; Y10; Y10S; Y10S177/00; Y10S177/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1707822A
Cited
US2081367A
Cited
US2256937A
Cited
US2602660A
Cited
US2675222A
Cited
US2647323A
Cited
US2852243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |