Patent US2459632A successfully refreshed from Google Patents.
US2459632A
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US
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Comparison control system
Assignee: RCA Corp
•
Filing: 1947-12-26
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Granted: 1949-01-18
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Expires: 1967-12-26
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Engstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:02
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/22; H03K5/24; G; G05; G05B; G05B1/00; G05B1/01; G05B1/02; G05B1/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1898046A
Cited
US1812764A
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US1721216A
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US1840500A
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US1877279A
Cited
US2037925A
Cited
US2069505A
Cited
US2225353A
Cited
US2417023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-18 | 1952-07-19 | 1953-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-18 | 1956-07-19 | 1957-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-18 | 1960-07-19 | 1961-01-18 | $7700.00 | Window Closed / Lapsed |