US3546941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level gauges
Assignee: Whessoe Ltd
•
Filing: 1968-07-17
•
Granted: 1970-12-15
•
Expires: 1988-07-17
Abstract
No abstract record available.
Inventors
- 👤 Norman Weighell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:37
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/40; G01F23/42; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20732; Y10T74/20744
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3104861A
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US1237735A
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US1671553A
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US2342271A
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US2363533A
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US2345054A
Cited
GB781022A
Cited
US2904282A
Cited
GB927430A
Cited
US3098254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |