US2589700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric cable sheathing
Assignee: AT&T Inc
•
Filing: 1949-07-16
•
Granted: 1952-03-18
•
Expires: 1969-07-16
Abstract
No abstract record available.
Inventors
- 👤 Harold G Johnstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:46
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/18; H01B7/20; H01B7/202; H01B7/208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1187509A
Cited
DE659505C
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US2041842A
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US2039781A
Cited
US2255472A
Cited
GB526593A
Cited
GB516908A
Cited
US2386747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |