Patent US2266401A successfully refreshed from Google Patents.
US2266401A
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Signaling system
Assignee: International Standard Electric Corp
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Filing: 1938-06-09
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Granted: 1941-12-16
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Expires: 1958-06-09
Abstract
No abstract record available.
Inventors
- 👤 Reeves Alec Harley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:47
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02; B; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/0803; H03; H03B; H03B7/00; H03B7/02; H03B7/10; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/55; H03K7/00; H03K7/08; H04B14/026; H04J; H04J3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-12-15 | 1945-06-16 | 1945-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-12-15 | 1949-06-16 | 1949-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-12-15 | 1953-06-16 | 1953-12-16 | $7700.00 | Window Closed / Lapsed |