Patent US3442135A successfully refreshed from Google Patents.
US3442135A
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Device for measurement of gas properties and gas flow rate
Assignee: Quantum Dynamics Inc
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Filing: 1967-02-09
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Granted: 1969-05-06
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Expires: 1987-02-09
Abstract
No abstract record available.
Inventors
- 👤 Frederick F Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:12
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/16; B; B64; B64G; B64G1/00; B64G1/22; B64G1/52; F; F16; F16J; F16J15/00; F16J15/44; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/38; G01F1/386; G01L; G01L7/00; G01L7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-05 | 1972-11-04 | 1973-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-05 | 1976-11-04 | 1977-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-05 | 1980-11-04 | 1981-05-06 | $7700.00 | Window Closed / Lapsed |