US2585878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skimming apparatus
Assignee: Standard Oil Development Co
•
Filing: 1949-01-26
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Granted: 1952-02-12
•
Expires: 1969-01-26
Abstract
No abstract record available.
Inventors
- 👤 Richard W Tryon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:54
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; B01D17/0214
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2287975A
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US723618A
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US1157176A
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US1698002A
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US1855982A
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US1808279A
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US2330508A
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US2462368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |