US2458552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making electrical contacting elements
Assignee: AT&T Inc
•
Filing: 1946-11-09
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Granted: 1949-01-11
•
Expires: 1966-11-09
Abstract
No abstract record available.
Inventors
- 👤 David G Blattner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:31
CPC Classifications
H; H01; H01H; H01H11/00; H01H11/04; H01H11/041; H01H63/00; H01H63/02; H01H63/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49208; Y10T29/4921
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) | 1952-01-11 | 1952-07-12 | 1953-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-11 | 1956-07-12 | 1957-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-11 | 1960-07-12 | 1961-01-11 | $7700.00 | Window Closed / Lapsed |