Patent US2487147A successfully refreshed from Google Patents.
US2487147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionating methane and ethane from hydrocarbon mixtures
Assignee: Phillips Petroleum Co
•
Filing: 1946-03-22
•
Granted: 1949-11-08
•
Expires: 1966-03-22
Abstract
No abstract record available.
Inventors
- 👤 Jr John W Latchum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:39
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0209; C; C07; C07C; C07C7/00; C07C7/005; F25J3/0228; F25J3/0233; F25J3/0242; F25J2200/00; F25J2200/04; F25J2200/72; F25J2200/74; F25J2205/00; F25J2205/02; F25J2205/04; F25J2245/00; F25J2245/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2168316A
Cited
US1957818A
Cited
US2074978A
Cited
US2070864A
Cited
US2138218A
Cited
US2249884A
Cited
US2307024A
Cited
US2303609A
Cited
US2301520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |