US2467951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic controlling means for fractionating towers
Assignee: Individual
•
Filing: 1946-05-09
•
Granted: 1949-04-19
•
Expires: 1966-05-09
Abstract
No abstract record available.
Inventors
- 👤 Record R Whitley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:05
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/4261; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/265; Y10T137/7287; Y10T137/7297; Y10T137/7313; Y10T137/7323; Y10T137/7358; Y10T137/7413
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2401512A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-18 | 1952-10-18 | 1953-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-18 | 1956-10-18 | 1957-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-18 | 1960-10-18 | 1961-04-19 | $7700.00 | Window Closed / Lapsed |