US2916889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic purging of liquid methane tanks
Assignee: Phillips Petroleum Co
•
Filing: 1955-07-14
•
Granted: 1959-12-15
•
Expires: 1975-07-14
Abstract
No abstract record available.
Inventors
- 👤 Robert E Sattler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:36
CPC Classifications
F; F17; F17C; F17C13/00; F17C13/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1533587A
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US1912458A
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US2189147A
Cited
US2543362A
Cited
US2656856A
Cited
US2718330A
Cited
US2650478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |