US2093645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus of refining hydrocarbon oil
Assignee: Individual
•
Filing: 1935-02-05
•
Granted: 1937-09-21
•
Expires: 1955-02-05
Abstract
No abstract record available.
Inventors
- 👤 Walter J Podbielniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:04
CPC Classifications
C; C10; C10G; C10G17/00; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0446; B01D11/0461; B01D53/00; B01D53/14; B01D53/18; B01F; B01F25/00; B01F25/60; C10G21/00; Y; Y10; Y10S; Y10S494/00; Y10S494/901
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1940-09-20 | 1941-03-22 | 1941-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-09-20 | 1945-03-22 | 1945-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-09-20 | 1949-03-22 | 1949-09-21 | $7700.00 | Window Closed / Lapsed |