Patent US1975476A successfully refreshed from Google Patents.
US1975476A
Expired / Lapsed
US
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Production of organic compounds by dehydrogenation
Assignee: IG Farbenindustrie AG
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Filing: 1929-12-24
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Granted: 1934-10-02
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Expires: 1949-12-24
Abstract
No abstract record available.
Inventors
- 👤 Pier Mathias
- 👤 Donath Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:13
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/40; C07; C07C; C07C5/00; C07C5/32; C07C5/321; C07C5/322; C07C5/327; C07C5/333; C07C5/3332; C07C5/367
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) | 1937-10-01 | 1938-04-02 | 1938-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-10-01 | 1942-04-02 | 1942-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-10-01 | 1946-04-02 | 1946-10-02 | $7700.00 | Window Closed / Lapsed |