US2472885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic multiple stage telegraph system
Assignee: Schneider Electric Buildings Americas Inc
•
Filing: 1940-07-19
•
Granted: 1949-06-14
•
Expires: 1960-07-19
Abstract
No abstract record available.
Inventors
- 👤 Howard D Colman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:58
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/54; H04L13/00; H04L13/02; H04L13/08
Claims Analysis
Total Claims: 0
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US2193967A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |