Patent US2785356A successfully refreshed from Google Patents.
US2785356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer
Assignee: Phillips Petroleum Co
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Filing: 1955-06-13
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Granted: 1957-03-12
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Expires: 1975-06-13
Abstract
No abstract record available.
Inventors
- 👤 Robert G Nisle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:14
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/16; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/22; G01H; G01H1/00; H; H03; H03F; H03F9/00
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) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |