US3410528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete vibrator
Assignee: Koehring Co
•
Filing: 1966-10-17
•
Granted: 1968-11-12
•
Expires: 1986-10-17
Abstract
No abstract record available.
Inventors
- 👤 Loris D Clark
- 👤 William H Heinzroth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:49
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)
US1678335A
Cited
US2137328A
Cited
US2492431A
Cited
US2501158A
Cited
US2844041A
Cited
US2808238A
Cited
US3283598A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |