Patent US1823503A successfully refreshed from Google Patents.
US1823503A
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Manufacture of unsaturated hydrocarbons
Assignee: IG Farbenindustrie AG
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Filing: 1927-01-19
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Granted: 1931-09-15
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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 12:22
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
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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) | 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 |