US3501956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring apparatus for suddenly varying gas temperatures in internal reciprocating engines utilizing ultrasonic waves
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1967-06-28
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Granted: 1970-03-24
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Expires: 1987-06-28
Abstract
No abstract record available.
Inventors
- 👤 Joji Yamaga
- 👤 Shuji Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:46
CPC Classifications
G; G01; G01K; G01K11/00; G01K11/22; G01N; G01N29/00; G01N29/02; G01N2291/00; G01N2291/02; G01N2291/021; G01N2291/0217; G01N2291/028; G01N2291/02881
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2099687A
Cited
US2834236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |