US2533552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal converter for multisignal transmission systems
Assignee: Research Corp
•
Filing: 1945-11-21
•
Granted: 1950-12-12
•
Expires: 1965-11-21
Abstract
No abstract record available.
Inventors
- 👤 John F Brinster
- 👤 Larsen Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:41
CPC Classifications
G; G08; G08C; G08C15/00; G08C15/06; G08C15/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1687882A
Cited
US1906627A
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US1928093A
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US1942457A
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US1991027A
Cited
US2015523A
Cited
US2048081A
Cited
US2389646A
Cited
US2440049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |