US2070100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionating tower
Assignee: Individual
•
Filing: 1934-10-26
•
Granted: 1937-02-09
•
Expires: 1954-10-26
Abstract
No abstract record available.
Inventors
- 👤 Lee S Twomey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:32
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04642; F25J3/04648; F25J3/04654; F25J3/04666; F25J3/04672; F25J3/04763; F25J3/04866; F25J3/04896; F25J3/04933; F25J3/04939; Y; Y10; Y10S; Y10S203/00; Y10S203/11; Y10S62/00; Y10S62/902; Y10S62/905
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) | 1940-02-09 | 1940-08-10 | 1941-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-02-09 | 1944-08-10 | 1945-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-02-09 | 1948-08-10 | 1949-02-09 | $7700.00 | Window Closed / Lapsed |