US2715705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor control system for indicating and recording rotameter
Assignee: Dow Chemical Co
•
Filing: 1951-07-16
•
Granted: 1955-08-16
•
Expires: 1971-07-16
Abstract
No abstract record available.
Inventors
- 👤 Ormond E Barstow
- 👤 William A Bridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:12
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/22; G01F1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1838084A
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US2354945A
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US2357745A
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US2503091A
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US2593339A
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US2437661A
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US2503868A
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US2534958A
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US2452023A
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US2576611A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-15 | 1959-02-14 | 1959-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-15 | 1963-02-14 | 1963-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-15 | 1967-02-14 | 1967-08-16 | $7700.00 | Window Closed / Lapsed |