US3437834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for detecting time of occurrence of signals having an amplitude which exceeds a predetermined level
Assignee: Schlumberger Technology Corp
•
Filing: 1965-08-27
•
Granted: 1969-04-08
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Expires: 1985-08-27
Abstract
No abstract record available.
Inventors
- 👤 Robert J Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:12
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/153; G; G04; G04F; G04F10/00; Y; Y10; Y10S; Y10S367/00; Y10S367/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2963646A
Cited
US3237153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |