Patent US2072581A successfully refreshed from Google Patents.
US1422182A
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Treating gaseous hydrocarbon mixtures
Assignee: Union Carbide Corp
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Filing: 1919-06-05
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Granted: 1922-07-11
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Expires: 1939-06-05
Abstract
No abstract record available.
Inventors
- 👤 Jr George O Curme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:13
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1925-07-10 | 1926-01-09 | 1926-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-07-10 | 1930-01-09 | 1930-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-07-10 | 1934-01-09 | 1934-07-11 | $7700.00 | Window Closed / Lapsed |