US3468418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Natural frequency vibrating screen
Assignee: Allis Chalmers Corp
•
Filing: 1967-06-21
•
Granted: 1969-09-23
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Expires: 1987-06-21
Abstract
No abstract record available.
Inventors
- 👤 Elmer J Renner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:56
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/28; B07B1/284; B07B2201/00; B07B2201/04; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18344; Y10T74/18544; Y10T74/18552
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2531706A
Cited
US2702633A
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US3053379A
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US2964186A
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US3053380A
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US3089582A
Cited
US3203264A
Cited
GB984575A
Cited
US3346097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |