US2991646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sampling system for a process analyzer
Assignee: Phillips Petroleum Co
•
Filing: 1956-09-20
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Granted: 1961-07-11
•
Expires: 1976-09-20
Abstract
No abstract record available.
Inventors
- 👤 Robert E Wightman
- 👤 Kenneth V Kratochvil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:17
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/40; G01N1/4077
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA515053A
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FR1066740A
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US2717536A
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FR1110045A
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US2776053A
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US2767319A
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US2794832A
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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) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |