Patent US2193450A successfully refreshed from Google Patents.
US2193450A
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Assignee: AT&T Inc
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Filing: 1937-11-17
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Granted: 1940-03-12
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Expires: 1957-11-17
Abstract
No abstract record available.
Inventors
- 👤 John B Dixon
- 👤 Chester S Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:31
CPC Classifications
H; H01; H01R; H01R4/00; H01R4/10; Y; Y10; Y10S; Y10S16/00; Y10S16/41; Y10S29/00; Y10S29/032; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49929; Y10T29/49931; Y10T403/00; Y10T403/49; Y10T403/57; Y10T403/5733
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) | 1943-03-12 | 1943-09-11 | 1944-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-03-12 | 1947-09-11 | 1948-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-03-12 | 1951-09-11 | 1952-03-12 | $7700.00 | Window Closed / Lapsed |