US2290880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethers of alcohol amines
Assignee: EMULSOL Corp
•
Filing: 1939-04-03
•
Granted: 1942-07-28
•
Expires: 1959-04-03
Abstract
No abstract record available.
Inventors
- 👤 Katzman Morris
- 👤 Albert K Epstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:33
CPC Classifications
C; C07; C07C; C07C217/00; C07C217/02; C07C217/04; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05; Y10S516/07
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) | 1945-07-27 | 1946-01-26 | 1946-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-27 | 1950-01-26 | 1950-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-27 | 1954-01-26 | 1954-07-28 | $7700.00 | Window Closed / Lapsed |