Patent US2938598A successfully refreshed from Google Patents.
US2938598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collector
Assignee: W W SLY Manufacturing Co
•
Filing: 1958-02-14
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Granted: 1960-05-31
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Expires: 1978-02-14
Abstract
No abstract record available.
Inventors
- 👤 Allen H Jones
- 👤 Norman W Hilliker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:38
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/66; B01D46/70; B01D46/71; Y; Y10; Y10S; Y10S55/00; Y10S55/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US407948A
Cited
US1830097A
Cited
US2507335A
Cited
US2583039A
Cited
US2695681A
Cited
US2867289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |