US2688853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing vapors from gases
Assignee: Phillips Petroleum Co
•
Filing: 1948-11-22
•
Granted: 1954-09-14
•
Expires: 1968-11-22
Abstract
No abstract record available.
Inventors
- 👤 Karl H Hachmuth
- 👤 Edward L Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:39
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)
US1724513A
Cited
US2141997A
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DE685490C
Cited
GB525197A
Cited
US2252738A
Cited
US2516717A
Cited
US2560469A
Cited
US2537044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |