US2313175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum distillation process and apparatus
Assignee: Carbide and Carbon Chemicals Corp
•
Filing: 1941-03-20
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Granted: 1943-03-09
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Expires: 1961-03-20
Abstract
No abstract record available.
Inventors
- 👤 Robert F Scott
- 👤 Argyle C Plewes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:40
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/30; B01D1/00; B01D1/0011; B01D1/0017; B01D3/12; Y; Y10; Y10S; Y10S159/00; Y10S159/01; Y10S159/07; Y10S203/00; Y10S203/11; Y10S411/00; Y10S411/915
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) | 1946-03-08 | 1946-09-07 | 1947-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-03-08 | 1950-09-07 | 1951-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-03-08 | 1954-09-07 | 1955-03-09 | $7700.00 | Window Closed / Lapsed |