US1250879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for fractionating hydrocarbons.
Assignee: Individual
•
Filing: 1916-10-21
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Granted: 1917-12-18
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Expires: 1936-10-21
Abstract
No abstract record available.
Inventors
- 👤 Leon E Hirt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:55
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/16
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) | 1920-12-17 | 1921-06-18 | 1921-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-12-17 | 1925-06-18 | 1925-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-12-17 | 1929-06-18 | 1929-12-18 | $7700.00 | Window Closed / Lapsed |