Patent US1908935A successfully refreshed from Google Patents.
US1908935A
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US
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Process for preparing disulphides
Assignee: IG Farbenindustrie AG
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Filing: 1931-05-01
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Granted: 1933-05-16
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Expires: 1951-05-01
Abstract
No abstract record available.
Inventors
- 👤 Tschunkur Eduard
- 👤 Herdieckerhoff Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:10
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/60; C07D277/62; C07D277/68; C07D277/70; C07D277/76; C07D277/78; C07B; C07B45/00; C07B45/06
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) | 1936-05-15 | 1936-11-14 | 1937-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-05-15 | 1940-11-14 | 1941-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-05-15 | 1944-11-14 | 1945-05-16 | $7700.00 | Window Closed / Lapsed |