US2474735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydration of compounds by distillation with hydrophobic oil
Assignee: Merck and Co Inc
•
Filing: 1945-05-16
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Granted: 1949-06-28
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Expires: 1965-05-16
Abstract
No abstract record available.
Inventors
- 👤 William S Harmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:29
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/62; C07D213/70; C07D213/71; B; B01; B01D; B01D3/00; B01D3/34; C07D215/00; C07D215/02; C07D215/16; C07D215/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2058435A
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US1549885A
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US1989541A
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US2138048A
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US2144654A
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US2264759A
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US2326099A
Cited
US2360156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-27 | 1952-12-27 | 1953-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-27 | 1956-12-27 | 1957-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-27 | 1960-12-27 | 1961-06-28 | $7700.00 | Window Closed / Lapsed |