Patent US1915431A successfully refreshed from Google Patents.
US1915431A
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Process of hydrogenating polyhydroxy compounds and substances obtainable thereby
Assignee: IG Farbenindustrie AG
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Filing: 1928-10-20
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Granted: 1933-06-27
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Expires: 1948-10-20
Abstract
No abstract record available.
Inventors
- 👤 Lautenschlager Karl Ludwig
- 👤 Bockmuhl Max
- 👤 Ehrhart Gustav
- 👤 Krohs Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:02
CPC Classifications
C; C07; C07C; C07C31/00; C07C31/18; C07C31/26
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) | 1936-06-26 | 1936-12-26 | 1937-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-06-26 | 1940-12-26 | 1941-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-06-26 | 1944-12-26 | 1945-06-27 | $7700.00 | Window Closed / Lapsed |