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US2823540A
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Apparatus and method for metering entrained air or gas
Assignee: CLARA L PATCH
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Filing: 1951-01-19
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Granted: 1958-02-18
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Expires: 1971-01-19
Abstract
No abstract record available.
Inventors
- 👤 Clara L Patch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:36
CPC Classifications
G; G01; G01N; G01N7/00; G01N7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US966078A
Cited
US1377577A
Cited
US2056196A
Cited
US2113686A
Cited
US2327642A
Cited
US2280617A
Cited
US2465948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |