US2666568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressed air supply system
Assignee: Westinghouse Air Brake Co
•
Filing: 1950-11-29
•
Granted: 1954-01-19
•
Expires: 1970-11-29
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:44
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/02; F04B49/022; F04B39/00; F04B39/16; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/6416
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) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |