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Patent US2648441A successfully refreshed from Google Patents.
US2648441A
Expired / Lapsed
US
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Vibrating equipment
Assignee: Productive Equipment Corp
•
Filing: 1948-01-17
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Granted: 1953-08-11
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Expires: 1968-01-17
Abstract
No abstract record available.
Inventors
- 👤 Lewis E Soldan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:30
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/46; B07B1/48
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |