US2857216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-balancing spindle
Assignee: Industrial Devices Inc
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Filing: 1955-07-11
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Granted: 1958-10-21
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Expires: 1975-07-11
Abstract
No abstract record available.
Inventors
- 👤 Cory P Geen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:13
CPC Classifications
D; D01; D01H; D01H7/00; D01H7/02; D01H7/04; D01H7/042; F; F16; F16C; F16C27/00; F16C27/06; F16C27/066; H; H02; H02K; H02K7/00; H02K7/14; H02K7/16; F16C2340/00; F16C2340/18
Claims Analysis
Total Claims: 0
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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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |