US2677303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil tester
Assignee: Bowser Inc
•
Filing: 1950-03-21
•
Granted: 1954-05-04
•
Expires: 1970-03-21
Abstract
No abstract record available.
Inventors
- 👤 Walter M Harks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:16
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/251
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2253049A
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US1763544A
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US1905251A
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US2082252A
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US2062588A
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US2022919A
Cited
US2056791A
Cited
US2133514A
Cited
US2157438A
Cited
US2255034A
Cited
US2413208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |