Patent US1932180A successfully refreshed from Google Patents.
US1932180A
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Sulphuric acid derivatives of amides
Assignee: IG Farbenindustrie AG
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Filing: 1932-05-27
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Granted: 1933-10-24
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Expires: 1952-05-27
Abstract
No abstract record available.
Inventors
- 👤 Guenther Fritz
- 👤 Munz Ferdinand
- 👤 Haussmann Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:13
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/13; C07C309/14; C07C303/00; C07C303/02; C07C303/04; C07C303/06; C07C303/24; C07C309/15; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/54; C07C2601/00; C07C2601/12; C07C2601/14; C07C2602/00; C07C2602/02; C07C2602/14; C07C2602/26; C07C2602/28; C07C2602/36; C07C2602/44; Y; Y10; Y10S; Y10S162/00; Y10S162/03
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) | 1936-10-23 | 1937-04-24 | 1937-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-10-23 | 1941-04-24 | 1941-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-10-23 | 1945-04-24 | 1945-10-24 | $7700.00 | Window Closed / Lapsed |