US2970473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature compensated gas flow meter
Assignee: Westinghouse Air Brake Co
•
Filing: 1957-05-21
•
Granted: 1961-02-07
•
Expires: 1977-05-21
Abstract
No abstract record available.
Inventors
- 👤 Robert M Kendig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:45
CPC Classifications
G; G01; G01F; G01F15/00; G01F15/02; G01F15/04; G01F15/043; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7761
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2206618A
Cited
DE721896C
Cited
US2275317A
Cited
US2488221A
Cited
US2650607A
Cited
US2718144A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |