US2476857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion chamber
Assignee: Westinghouse Electric Corp
•
Filing: 1946-03-08
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Granted: 1949-07-19
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Expires: 1966-03-08
Abstract
No abstract record available.
Inventors
- 👤 Louis N Grafinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:51
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/025; Y; Y10; Y10S; Y10S60/00; Y10S60/914; Y10T; Y10T74/00; Y10T74/12; Y10T74/1282
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) | 1952-07-18 | 1953-01-17 | 1953-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-18 | 1957-01-17 | 1957-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-18 | 1961-01-17 | 1961-07-19 | $7700.00 | Window Closed / Lapsed |