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US2987923A
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Viscosity measuring device
Assignee: Individual
•
Filing: 1956-02-17
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Granted: 1961-06-13
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Expires: 1976-02-17
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Hoeppel
- 👤 Walter G Thiele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:45
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/08; G; G01; G01N; G01N11/00; G01N11/02; G01N11/04; G01N11/08; G01N9/00; G01N9/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499; Y10T137/2506
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1511604A
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US1641673A
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US1945822A
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US2252014A
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US2238758A
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US2393838A
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US2412397A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |