US2280093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distillation method and apparatus
Assignee: Arthur D Little Inc
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Filing: 1941-05-01
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Granted: 1942-04-21
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Expires: 1961-05-01
Abstract
No abstract record available.
Inventors
- 👤 Robert V Kleinschmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:52
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/28; B01D1/2896; B01D1/289; Y; Y10; Y10S; Y10S203/00; Y10S203/11; Y10S203/18
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) | 1945-04-20 | 1945-10-20 | 1946-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-04-20 | 1949-10-20 | 1950-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-04-20 | 1953-10-20 | 1954-04-21 | $7700.00 | Window Closed / Lapsed |