Patent US2349992A successfully refreshed from Google Patents.
US2349992A
Expired / Lapsed
US
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Device for indicating contaminations in oil circulation systems
Assignee: Individual
•
Filing: 1940-10-10
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Granted: 1944-05-30
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Expires: 1960-10-10
Abstract
No abstract record available.
Inventors
- 👤 Schrader Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:42
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/08; G01V3/088; G01N; G01N15/00; G01N15/06; G01N15/0656
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) | 1947-05-30 | 1947-11-29 | 1948-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-05-30 | 1951-11-29 | 1952-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-05-30 | 1955-11-29 | 1956-05-30 | $7700.00 | Window Closed / Lapsed |