US1923178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxy alkyl ethers of tertiary amines and process of preparing same
Assignee: IG Farbenindustrie AG
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Filing: 1931-03-16
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Granted: 1933-08-22
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Expires: 1951-03-16
Abstract
No abstract record available.
Inventors
- 👤 Ulrich Heinrich
- 👤 Nuesslein Joseph
- 👤 Koerding Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:48
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07; Y10S516/905; Y10S516/914; Y10S516/916
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) | 1936-08-21 | 1937-02-20 | 1937-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-08-21 | 1941-02-20 | 1941-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-08-21 | 1945-02-20 | 1945-08-22 | $7700.00 | Window Closed / Lapsed |