US2417992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N, n-dialkyl morpholinium alkylsulfates
Assignee: Individual
•
Filing: 1942-04-14
•
Granted: 1947-03-25
•
Expires: 1962-04-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Niederl
- 👤 Niederl Victor
- 👤 Martin E Mcgreal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:39
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02; C07D295/037
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2129805A
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US2054257A
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GB433356A
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US2132902A
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GB474671A
Cited
US2132903A
Cited
US2186628A
Cited
US2295504A
Cited
US2229024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-24 | 1950-09-23 | 1951-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-24 | 1954-09-23 | 1955-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-24 | 1958-09-23 | 1959-03-25 | $7700.00 | Window Closed / Lapsed |