US2854092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust separators
Assignee: Hjorth & Co AB
•
Filing: 1954-04-06
•
Granted: 1958-09-30
•
Expires: 1974-04-06
Abstract
No abstract record available.
Inventors
- 👤 Gustavsson Karl Axel Goran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:36
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/24; B04C5/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR905805A
Cited
US2533991A
Cited
DE849507C
Cited
US2643737A
Cited
US2632527A
Cited
FR1097828A
Cited
GB739974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |