US2442997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronous electric signaling system
Assignee: Bendix Aviation Corp
•
Filing: 1944-10-04
•
Granted: 1948-06-08
•
Expires: 1964-10-04
Abstract
No abstract record available.
Inventors
- 👤 Cooper Julius Louis
- 👤 Philip A Heist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:33
CPC Classifications
G; G08; G08B; G08B9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1135322A
Cited
US1554980A
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US1607917A
Cited
US1745961A
Cited
US1755212A
Cited
US2031970A
Cited
DE658871C
Cited
US2368300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-08 | 1951-12-08 | 1952-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-08 | 1955-12-08 | 1956-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-08 | 1959-12-08 | 1960-06-08 | $7700.00 | Window Closed / Lapsed |