US2398836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distillation system
Assignee: Individual
•
Filing: 1943-02-13
•
Granted: 1946-04-23
•
Expires: 1963-02-13
Abstract
No abstract record available.
Inventors
- 👤 Lea Grace Joel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:30
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/02; B01D1/06; C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/16; Y; Y10; Y10S; Y10S203/00; 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) | 1949-04-22 | 1949-10-22 | 1950-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-22 | 1953-10-22 | 1954-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-22 | 1957-10-22 | 1958-04-23 | $7700.00 | Window Closed / Lapsed |