US2440173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple effect still with thermocompression of vapors
Assignee: Individual
•
Filing: 1942-06-15
•
Granted: 1948-04-20
•
Expires: 1962-06-15
Abstract
No abstract record available.
Inventors
- 👤 Roy O Henszey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:00
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/28; B01D1/26; Y; Y10; Y10S; Y10S203/00; Y10S203/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1706719A
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US2010929A
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USRE21129E
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US1954371A
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US2104333A
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US2193483A
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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) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |