US2882648A
Expired / Lapsed
US
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Assignee: AT&T Inc
•
Filing: 1954-11-01
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Granted: 1959-04-21
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Expires: 1974-11-01
Abstract
No abstract record available.
Inventors
- 👤 Ole M Hovgaard
- 👤 Insley Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:28
CPC Classifications
H; H01; H01H; H01H11/00; H01H11/005; Y; Y10; Y10S; Y10S65/00; Y10S65/12; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2273437A
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US2273439A
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US2648167A
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US2663120A
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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) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |