Patent US2686246A successfully refreshed from Google Patents.
US2686246A
Expired / Lapsed
US
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Apparatus for making electrostatic shields
Assignee: AT&T Inc
•
Filing: 1952-05-13
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Granted: 1954-08-10
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Expires: 1972-05-13
Abstract
No abstract record available.
Inventors
- 👤 John C Souter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:12
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/002; B23K11/0026; Y; Y10; Y10T; Y10T83/00; Y10T83/444; Y10T83/463; Y10T83/4632
Claims Analysis
Total Claims: 0
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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) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |