US2921292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual channel receiver and transmitter
Assignee: MULTI PRODUCTS Co
•
Filing: 1954-07-14
•
Granted: 1960-01-12
•
Expires: 1974-07-14
Abstract
No abstract record available.
Inventors
- 👤 Gustav E Undy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:21
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/12; G08C19/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2150241A
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US2379631A
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US2293869A
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US2392672A
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US2457730A
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US2554329A
Cited
US2500212A
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US2523315A
Cited
US2724049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |