US2449926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of alcohol nontertiary amines
Assignee: EMULSOL Corp
•
Filing: 1941-08-29
•
Granted: 1948-09-21
•
Expires: 1961-08-29
Abstract
No abstract record available.
Inventors
- 👤 Frank J Cahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:15
CPC Classifications
C; C07; C07C; C07C215/00; C07C215/02; C07C215/40
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2076217A
Cited
GB337774A
Cited
GB337737A
Cited
US2022678A
Cited
US2004476A
Cited
US1936533A
Cited
US1952008A
Cited
US2058013A
Cited
US2089212A
Cited
US2169515A
Cited
US2151788A
Cited
US2239997A
Cited
US2305083A
Cited
US2280830A
Cited
US2354320A
Cited
US2355442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |