US2874280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Step-wave generator with means to adjust and measure height of any step
Assignee: RCA Corp
•
Filing: 1953-04-29
•
Granted: 1959-02-17
•
Expires: 1973-04-29
Abstract
No abstract record available.
Inventors
- 👤 James M Mcculley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:47
CPC Classifications
H; H04; H04N; H04N17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2527967A
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US2495168A
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US2624770A
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US2591738A
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US2668188A
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US2714704A
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US2742525A
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US2792496A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |