US2690275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-pressure closure
Assignee: American Locomotive Co
•
Filing: 1952-03-22
•
Granted: 1954-09-28
•
Expires: 1972-03-22
Abstract
No abstract record available.
Inventors
- 👤 Harold M Alt
- 👤 Westover Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:03
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/22; F22B37/221; Y; Y10; Y10T; Y10T292/00; Y10T292/20; Y10T292/205
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) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |