US2808238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete vibrator
Assignee: MASTER VIBRATOR CO
•
Filing: 1955-08-09
•
Granted: 1957-10-01
•
Expires: 1975-08-09
Abstract
No abstract record available.
Inventors
- 👤 Clem H Spitler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:58
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/02; E04G21/06; E04G21/08; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18544; Y10T74/18552
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1132992A
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US1552079A
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US1624423A
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FR676439A
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US2085998A
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US2089249A
Cited
GB500861A
Cited
US2176118A
Cited
US2232842A
Cited
FR851908A
Cited
US2531120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |