Patent US3574552A successfully refreshed from Google Patents.
Patent US2857581A successfully refreshed from Google Patents.
US2857581A
Expired / Lapsed
US
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Plugs for communications cords and methods of making the same
Assignee: AT&T Inc
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Filing: 1953-05-07
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Granted: 1958-10-21
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Expires: 1973-05-07
Abstract
No abstract record available.
Inventors
- 👤 George E Henning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:58
CPC Classifications
H; H01; H01R; H01R43/00; H01R43/20; H01R43/24; Y; Y10; Y10S; Y10S425/00; Y10S425/051; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |