US2561720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for removing condensables from gases
Assignee: Phillips Petroleum Co
•
Filing: 1949-01-04
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Granted: 1951-07-24
•
Expires: 1969-01-04
Abstract
No abstract record available.
Inventors
- 👤 Carl E Alleman
- 👤 Donald J Quigg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:55
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/08; F25J2210/00; F25J2210/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1139484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |