Patent US2451604A successfully refreshed from Google Patents.
US2451604A
Expired / Lapsed
US
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Apparatus for measuring density of a thixotropic fluid
Assignee: Sunoco Inc
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Filing: 1945-08-22
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Granted: 1948-10-19
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Expires: 1965-08-22
Abstract
No abstract record available.
Inventors
- 👤 William E Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:34
CPC Classifications
G; G01; G01N; G01N9/00; G01N9/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US35152A
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US1136789A
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US1178902A
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US1686688A
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US1669460A
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US1878801A
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US2279254A
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US2338825A
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US2369707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |