US2784725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal-washer apparatus
Assignee: Standard Oil Co
•
Filing: 1953-04-30
•
Granted: 1957-03-12
•
Expires: 1973-04-30
Abstract
No abstract record available.
Inventors
- 👤 Olin E Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:06
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US675179A
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US1109728A
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US1880925A
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US2324869A
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US2221806A
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US2598449A
Cited
US2617274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |