US2669501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recorder with movable chart carriage
Assignee: Westinghouse Electric Corp
•
Filing: 1947-05-28
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Granted: 1954-02-16
•
Expires: 1967-05-28
Abstract
No abstract record available.
Inventors
- 👤 Douglass A Young
- 👤 Lawrence J Lunas
- 👤 Walsweer John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:27
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/24; G01D15/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1811417A
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US1967900A
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US2008970A
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US2059879A
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US2257998A
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US2308710A
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US2392487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |