US2251185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distillation apparatus
Assignee: EIDP Inc
•
Filing: 1939-04-17
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Granted: 1941-07-29
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Expires: 1959-04-17
Abstract
No abstract record available.
Inventors
- 👤 Albert S Carter
- 👤 Johnson Frank Willard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:27
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/42; B01D3/4205; Y; Y10; Y10S; Y10S203/00; Y10S203/02; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87788; Y10T137/87804
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-07-28 | 1945-01-27 | 1945-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-28 | 1949-01-27 | 1949-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-28 | 1953-01-27 | 1953-07-29 | $7700.00 | Window Closed / Lapsed |