US1823503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of unsaturated hydrocarbons
Assignee: IG Farbenindustrie AG
•
Filing: 1927-01-19
•
Granted: 1931-09-15
•
Expires: 1947-01-19
Abstract
No abstract record available.
Inventors
- 👤 Mittasch Alwin
- 👤 Frankenburger Walter
- 👤 Wietzel Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:30
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/76; C07C2/78; C10; C10G; C10G9/00; C10G9/34; C10G9/36; C10G9/38; Y; Y10; Y10S; Y10S48/00; Y10S48/05; Y10S585/00; Y10S585/919; Y10S585/921; Y10S585/949; Y10S585/95
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) | 1934-09-14 | 1935-03-16 | 1935-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-09-14 | 1939-03-16 | 1939-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-09-14 | 1943-03-16 | 1943-09-15 | $7700.00 | Window Closed / Lapsed |