Patent US3528440A successfully refreshed from Google Patents.
US3528440A
Expired / Lapsed
US
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Vapor-liquid ratio monitor
Assignee: Mobil Oil AS
•
Filing: 1969-10-20
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Granted: 1970-09-15
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Expires: 1989-10-20
Abstract
No abstract record available.
Inventors
- 👤 Julius Plucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:20
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/26; G01N33/28; G01N33/2829; G01N7/00; G01N7/14; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/2496; Y10T137/2499
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2833151A
Cited
US2880611A
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US3037375A
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US3045702A
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US3103809A
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US3116642A
Cited
US3145561A
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US3276460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |