US2821292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torsion bar mounted vibratory motors
Assignee: Syntron Co
•
Filing: 1953-12-29
•
Granted: 1958-01-28
•
Expires: 1973-12-29
Abstract
No abstract record available.
Inventors
- 👤 William V Spurlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:50
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/08; B28B1/087; B28B1/0873
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1986102A
Cited
US2241527A
Cited
US2325248A
Cited
US2678720A
Cited
US2638206A
Cited
US2654466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |