US4641139B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measuring the level of a fluent material in a container
Assignee: Rosemount Tank Radar AB
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Filing: 1985-04-22
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Granted: 1998-04-14
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Expires: 2005-04-22
Abstract
No abstract record available.
Inventors
- 👤 Kurt O Edvardsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:34
CPC Classifications
B; B04; B04B; B04B3/00; G; G01; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/284; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08
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) | 2001-04-13 | 2001-10-13 | 2002-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-13 | 2005-10-13 | 2006-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-13 | 2009-10-13 | 2010-04-14 | $7700.00 | Window Closed / Lapsed |