US1939796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duct rodding apparatus
Assignee: AT&T Inc
•
Filing: 1932-09-13
•
Granted: 1933-12-19
•
Expires: 1952-09-13
Abstract
No abstract record available.
Inventors
- 👤 John B Spowart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:45
CPC Classifications
H; H02; H02G; H02G1/00; H02G1/06; H02G1/08
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) | 1936-12-18 | 1937-06-19 | 1937-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-12-18 | 1941-06-19 | 1941-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-12-18 | 1945-06-19 | 1945-12-19 | $7700.00 | Window Closed / Lapsed |