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US2157367A
Expired / Lapsed
US
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Pneumatic vibrating mechanism
Assignee: JOHN WALDRON Corp
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Filing: 1936-03-12
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Granted: 1939-05-09
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Expires: 1956-03-12
Abstract
No abstract record available.
Inventors
- 👤 Sterling W Warner
- 👤 Lynn B Case
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:41
CPC Classifications
D; D21; D21H; D21H23/00; D21H23/78; D21H5/00; D21H5/0005; D21H5/006; D21H5/0062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-05-08 | 1942-11-07 | 1943-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-08 | 1946-11-07 | 1947-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-08 | 1950-11-07 | 1951-05-09 | $7700.00 | Window Closed / Lapsed |