Patent US2942473A successfully refreshed from Google Patents.
US2942473A
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Pressure measuring apparatus
Assignee: Sunoco Inc
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Filing: 1958-02-04
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Granted: 1960-06-28
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Expires: 1978-02-04
Abstract
No abstract record available.
Inventors
- 👤 Fred M Mayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:56
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/06; G; G01; G01L; G01L9/00; G01L9/0091; F; F16; F16L; F16L2101/00; F16L2101/30
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) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |