US2542270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scraper apparatus for centrifugal evaporators
Assignee: Hurd Corp
•
Filing: 1948-11-05
•
Granted: 1951-02-20
•
Expires: 1968-11-05
Abstract
No abstract record available.
Inventors
- 👤 George G Zahm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:25
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/22; B01D1/222; B01D1/223; B01D1/225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US176775A
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US440028A
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GB494847A
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US2306265A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |