US2450774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the evaporation and concentration of liquids
Assignee: Hurd Corp
•
Filing: 1943-08-12
•
Granted: 1948-10-05
•
Expires: 1963-08-12
Abstract
No abstract record available.
Inventors
- 👤 George G Zahm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:40
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2156212A
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US2145395A
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US2217261A
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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) | 1951-10-05 | 1952-04-05 | 1952-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-05 | 1956-04-05 | 1956-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-05 | 1960-04-05 | 1960-10-05 | $7700.00 | Window Closed / Lapsed |