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US2332800A
Expired / Lapsed
US
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Process for cleaning petroleum refining equipment
Assignee: Standard Oil Development Co
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Filing: 1941-02-12
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Granted: 1943-10-26
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Expires: 1961-02-12
Abstract
No abstract record available.
Inventors
- 👤 Walton B Killough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:11
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14
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) | 1946-10-25 | 1947-04-26 | 1947-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-10-25 | 1951-04-26 | 1951-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-10-25 | 1955-04-26 | 1955-10-26 | $7700.00 | Window Closed / Lapsed |