Patent US3466754A successfully refreshed from Google Patents.
US3466754A
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US
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Signalling drift indicator with fluid by-pass
Assignee: Jackson Memorial Hospital
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Filing: 1967-03-22
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Granted: 1969-09-16
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Expires: 1987-03-22
Abstract
No abstract record available.
Inventors
- 👤 Robert L Alder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:31
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/10; E21B47/00; E21B47/02; E21B47/12; E21B47/14; E21B47/18; E21B47/22; E21B47/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |