US2656536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillographic plotting system
Assignee: Stewart Warner Corp
•
Filing: 1951-04-17
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Granted: 1953-10-20
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Expires: 1971-04-17
Abstract
No abstract record available.
Inventors
- 👤 Robert W Lockhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:10
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/02; G01S3/14; G01S3/58; G01S3/66; G01S3/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1994232A
Cited
US2403967A
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US2476977A
Cited
US2477557A
Cited
US2574946A
Cited
US2475212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |