US2982943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal failure indication and system control
Assignee: Dresser Industries Inc
•
Filing: 1956-06-04
•
Granted: 1961-05-02
•
Expires: 1976-06-04
Abstract
No abstract record available.
Inventors
- 👤 Walter P Isaacson
- 👤 Luis H Tejada-Flores
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:18
CPC Classifications
G; G01; G01V; G01V13/00; G01V1/00; G01V1/40; G01V1/44; G01V1/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735084A
Cited
US2609533A
Cited
US2522609A
Cited
US2534746A
Cited
US2589465A
Cited
US2729808A
Cited
US2679037A
Cited
US2769971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |