US2884783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric apparatus for measuring and remote reading of liquid levels
Assignee: Ruhrchemie AG
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Filing: 1954-01-26
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Granted: 1959-05-05
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Expires: 1974-01-26
Abstract
No abstract record available.
Inventors
- 👤 Spengler Herbert
- 👤 Bischoff Kurt
- 👤 Dreeskampf Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:43
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/284; G01F23/292
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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |