Patent US2718449A successfully refreshed from Google Patents.
US2718449A
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US
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Pulse measuring apparatus
Assignee: Phillips Petroleum Co
•
Filing: 1949-09-23
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Granted: 1955-09-20
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Expires: 1969-09-23
Abstract
No abstract record available.
Inventors
- 👤 Raymond G Piety
- 👤 Jr Fred L Mcmillan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:43
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2412310A
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US2587319A
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US2501953A
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US2556457A
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US2596118A
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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) | 1958-09-19 | 1959-03-21 | 1959-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-19 | 1963-03-21 | 1963-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-19 | 1967-03-21 | 1967-09-20 | $7700.00 | Window Closed / Lapsed |