Patent US2174288A successfully refreshed from Google Patents.
US2174288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of olefins from gaseous or vaporous saturated hydrocarbons
Assignee: IG Farbenindustrie AG
•
Filing: 1936-05-29
•
Granted: 1939-09-26
•
Expires: 1956-05-29
Abstract
No abstract record available.
Inventors
- 👤 Klein Hans
- 👤 Hofeditz Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:09
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/02; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/955
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1942-09-25 | 1943-03-27 | 1943-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-09-25 | 1947-03-27 | 1947-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-09-25 | 1951-03-27 | 1951-09-26 | $7700.00 | Window Closed / Lapsed |