US2428450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparing purified mixtures of esters
Assignee: Honeywell International Inc
•
Filing: 1941-03-01
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Granted: 1947-10-07
•
Expires: 1961-03-01
Abstract
No abstract record available.
Inventors
- 👤 Michael A Eitelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:09
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/09; C07C29/095; C07C29/128; C07C29/1285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE239650C
Cited
DE218466C
Cited
GB119249A
Cited
US1459971A
Cited
US1691425A
Cited
US2049207A
Cited
US2309336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |