US3049919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mass flowmeter
Assignee: ROTH LAB FOR PHYSICAL RES
•
Filing: 1956-11-16
•
Granted: 1962-08-21
•
Expires: 1976-11-16
Abstract
No abstract record available.
Inventors
- 👤 Roth Wilfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:34
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/76; G01F1/86
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1401299A
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US2624198A
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US2669874A
Cited
US2714310A
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US2685200A
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US2769337A
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US2694927A
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US2804771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |