Patent US2644819A successfully refreshed from Google Patents.
US2644819A
Expired / Lapsed
US
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Morpholine derivatives
Assignee: Monsanto Chemicals Ltd
•
Filing: 1950-06-26
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Granted: 1953-07-07
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Expires: 1970-06-26
Abstract
No abstract record available.
Inventors
- 👤 Dazzi Joachim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:28
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/22; C07D295/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
COMPOUNDS HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
5 words
COMPOUNDS HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2270490A
Cited
US2234615A
Cited
US2255487A
Cited
US2269997A
Cited
US2270570A
Cited
US2361188A
Cited
US2373299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |