US2718339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow controller
Assignee: Phillips Petroleum Co
•
Filing: 1949-12-29
•
Granted: 1955-09-20
•
Expires: 1969-12-29
Abstract
No abstract record available.
Inventors
- 👤 Howard J Pankratz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:18
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/08; B01J8/082; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00081; B01J2219/00164
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US675376A
Cited
US1264732A
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US1588838A
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US1631430A
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US2590202A
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US2486200A
Cited
US2661868A
Cited
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 |