US2422281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for insulating conductors
Assignee: AT&T Inc
•
Filing: 1944-02-09
•
Granted: 1947-06-17
•
Expires: 1964-02-09
Abstract
No abstract record available.
Inventors
- 👤 Robert T Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:17
CPC Classifications
D; D04; D04B; D04B9/00; D04B9/42; D04B9/44; H; H01; H01B; H01B13/00; H01B13/06; Y; Y10; Y10S; Y10S118/00; Y10S118/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2291720A
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US2354260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-16 | 1950-12-16 | 1951-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-16 | 1954-12-16 | 1955-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-16 | 1958-12-16 | 1959-06-17 | $7700.00 | Window Closed / Lapsed |