US2144872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulator
Assignee: AT&T Inc
•
Filing: 1936-07-28
•
Granted: 1939-01-24
•
Expires: 1956-07-28
Abstract
No abstract record available.
Inventors
- 👤 Victor I Cruser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:34
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/08; Y; Y10; Y10T; Y10T24/00; Y10T24/34; Y10T24/3427; Y10T24/3439; Y10T24/344; Y10T24/3444; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49876
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-01-23 | 1942-07-25 | 1943-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-01-23 | 1946-07-25 | 1947-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-01-23 | 1950-07-25 | 1951-01-24 | $7700.00 | Window Closed / Lapsed |