US2929504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste-flow screening apparatus
Assignee: Chain Belt Co
•
Filing: 1958-05-19
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Granted: 1960-03-22
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Expires: 1978-05-19
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Lind
- 👤 Gilbert W Quast
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:47
CPC Classifications
E; E03; E03F; E03F5/00; E03F5/14; B; B01; B01D; B01D29/00; B01D29/01; B01D29/03; B01D29/035; B01D29/62; B01D29/64; B01D29/6469; B01D29/6476
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |